diff --git a/README.md b/README.md
index 6e1a4c6..84189fd 100644
--- a/README.md
+++ b/README.md
@@ -112,12 +112,11 @@ In order to use unsupported serializer you should create a decorator which imple
 
 # Roadmap to stable
 
-- [ ] `at(N)` - execute mock only at Nth call.  
-- [ ] `after(N)` - allow mock execution only after Nth call (for using with repeat or always).  
-- [ ] `always()` - always execute this mock (removes mock expiration).  
+- [x] `at(N)` - execute mock only at Nth call.
+- [x] `always()` - always execute this mock (removes mock expiration).  
 - [ ] Regexp matchers for body, query and path.  
-- [ ] Separate `UniversalMockException` into several exceptions (`PockClientException`, `PockNetworkException`, etc).  
-- [ ] Add methods for easier throwing of exceptions listed in previous entry.  
+- [x] Separate `UniversalMockException` into several exceptions (`PockClientException`, `PockNetworkException`, etc).  
+- [x] Add methods for easier throwing of exceptions listed in previous entry.  
 - [ ] `replyCallback` - reply using specified callback.  
 - [ ] `replyFactory` - reply using specified response factory (provide corresponding interface).  
 - [ ] Compare XML bodies using `DOMDocument`, fallback to text comparison in case of problems.  
diff --git a/phpmd.xml b/phpmd.xml
index 550b68e..fd51dcb 100644
--- a/phpmd.xml
+++ b/phpmd.xml
@@ -10,7 +10,15 @@
     <rule ref="rulesets/design.xml" />
     <rule ref="rulesets/cleancode.xml" />
     <rule ref="rulesets/codesize.xml" />
-    <rule ref="rulesets/naming.xml" />
+    <rule ref="rulesets/naming.xml">
+        <exclude name="ShortMethodName" />
+    </rule>
+
+    <rule ref="rulesets/naming.xml/ShortMethodName">
+        <properties>
+            <property name="minimum" value="2" />
+        </properties>
+    </rule>
 
     <exclude-pattern>tests/*</exclude-pattern>
 </ruleset>
diff --git a/src/Client.php b/src/Client.php
index edf74f4..b584530 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -74,17 +74,19 @@ class Client implements ClientInterface, HttpClient, HttpAsyncClient
                 continue;
             }
 
-            if ($mock->getMatcher()->matches($request)) {
+            if ($mock->matches($request)) {
                 if (null !== $mock->getResponse()) {
                     $mock->registerHit();
 
                     return new HttpFulfilledPromise($mock->getResponse());
                 }
 
-                if (null !== $mock->getThrowable()) {
+                $throwable = $mock->getThrowable($request);
+
+                if (null !== $throwable) {
                     $mock->registerHit();
 
-                    return new HttpRejectedPromise($mock->getThrowable());
+                    return new HttpRejectedPromise($throwable);
                 }
 
                 throw new IncompleteMockException($mock);
diff --git a/src/Exception/AbstractRequestAwareException.php b/src/Exception/AbstractRequestAwareException.php
new file mode 100644
index 0000000..03a014e
--- /dev/null
+++ b/src/Exception/AbstractRequestAwareException.php
@@ -0,0 +1,45 @@
+<?php
+
+/**
+ * PHP 7.3
+ *
+ * @category AbstractRequestAwareException
+ * @package  Pock\Exception
+ */
+
+namespace Pock\Exception;
+
+use Exception;
+use Psr\Http\Message\RequestInterface;
+
+/**
+ * Class AbstractRequestAwareException
+ *
+ * @category AbstractRequestAwareException
+ * @package  Pock\Exception
+ */
+class AbstractRequestAwareException extends Exception
+{
+    /** @var RequestInterface */
+    private $request;
+
+    /**
+     * @param \Psr\Http\Message\RequestInterface $request
+     *
+     * @return self
+     */
+    public function setRequest(RequestInterface $request): self
+    {
+        $instance = new static($this->message, $this->code, $this->getPrevious()); // @phpstan-ignore-line
+        $instance->request = $request;
+        return $instance;
+    }
+
+    /**
+     * @return \Psr\Http\Message\RequestInterface
+     */
+    public function getRequest(): RequestInterface
+    {
+        return $this->request;
+    }
+}
diff --git a/src/Exception/PockClientException.php b/src/Exception/PockClientException.php
new file mode 100644
index 0000000..df4e694
--- /dev/null
+++ b/src/Exception/PockClientException.php
@@ -0,0 +1,23 @@
+<?php
+
+/**
+ * PHP 7.3
+ *
+ * @category PockClientException
+ * @package  Pock\Exception
+ */
+
+namespace Pock\Exception;
+
+use Exception;
+use Psr\Http\Client\ClientExceptionInterface;
+
+/**
+ * Class PockClientException
+ *
+ * @category PockClientException
+ * @package  Pock\Exception
+ */
+class PockClientException extends Exception implements ClientExceptionInterface
+{
+}
diff --git a/src/Exception/PockNetworkException.php b/src/Exception/PockNetworkException.php
new file mode 100644
index 0000000..c2b686a
--- /dev/null
+++ b/src/Exception/PockNetworkException.php
@@ -0,0 +1,22 @@
+<?php
+
+/**
+ * PHP 7.3
+ *
+ * @category PockNetworkException
+ * @package  Pock\Exception
+ */
+
+namespace Pock\Exception;
+
+use Psr\Http\Client\NetworkExceptionInterface;
+
+/**
+ * Class PockNetworkException
+ *
+ * @category PockNetworkException
+ * @package  Pock\Exception
+ */
+class PockNetworkException extends AbstractRequestAwareException implements NetworkExceptionInterface
+{
+}
diff --git a/src/Exception/PockRequestException.php b/src/Exception/PockRequestException.php
new file mode 100644
index 0000000..15487fd
--- /dev/null
+++ b/src/Exception/PockRequestException.php
@@ -0,0 +1,22 @@
+<?php
+
+/**
+ * PHP 7.3
+ *
+ * @category PockRequestException
+ * @package  Pock\Exception
+ */
+
+namespace Pock\Exception;
+
+use Psr\Http\Client\RequestExceptionInterface;
+
+/**
+ * Class PockRequestException
+ *
+ * @category PockRequestException
+ * @package  Pock\Exception
+ */
+class PockRequestException extends AbstractRequestAwareException implements RequestExceptionInterface
+{
+}
diff --git a/src/Exception/UniversalMockException.php b/src/Exception/UniversalMockException.php
deleted file mode 100644
index d629536..0000000
--- a/src/Exception/UniversalMockException.php
+++ /dev/null
@@ -1,51 +0,0 @@
-<?php
-
-/**
- * PHP 7.2
- *
- * @category UniversalMockException
- * @package  Pock\Exception
- */
-
-namespace Pock\Exception;
-
-use Exception;
-use Psr\Http\Client\ClientExceptionInterface;
-use Psr\Http\Client\NetworkExceptionInterface;
-use Psr\Http\Client\RequestExceptionInterface;
-use Psr\Http\Message\RequestInterface;
-
-/**
- * Class UniversalMockException
- *
- * @category UniversalMockException
- * @package  Pock\Exception
- */
-class UniversalMockException extends Exception implements
-    ClientExceptionInterface,
-    NetworkExceptionInterface,
-    RequestExceptionInterface
-{
-    /** @var mixed */
-    private $request;
-
-    /**
-     * UniversalMockException constructor.
-     *
-     * @param mixed $request
-     */
-    public function __construct($request)
-    {
-        parent::__construct('Default mock exception');
-
-        $this->request = $request;
-    }
-
-    /**
-     * @inheritDoc
-     */
-    public function getRequest(): RequestInterface
-    {
-        return $this->request;
-    }
-}
diff --git a/src/Mock.php b/src/Mock.php
index 7ec5832..e10d863 100644
--- a/src/Mock.php
+++ b/src/Mock.php
@@ -9,7 +9,12 @@
 
 namespace Pock;
 
+use Pock\Exception\PockNetworkException;
+use Pock\Exception\PockRequestException;
 use Pock\Matchers\RequestMatcherInterface;
+use Psr\Http\Client\NetworkExceptionInterface;
+use Psr\Http\Client\RequestExceptionInterface;
+use Psr\Http\Message\RequestInterface;
 use Psr\Http\Message\ResponseInterface;
 use Throwable;
 
@@ -36,6 +41,9 @@ class Mock implements MockInterface
     /** @var int */
     private $maxHits;
 
+    /** @var int */
+    private $matchAt;
+
     /**
      * Mock constructor.
      *
@@ -43,18 +51,25 @@ class Mock implements MockInterface
      * @param \Psr\Http\Message\ResponseInterface|null $response
      * @param \Throwable|null                          $throwable
      * @param int                                      $maxHits
+     * @param int                                      $matchAt
      */
     public function __construct(
         RequestMatcherInterface $matcher,
         ?ResponseInterface $response,
         ?Throwable $throwable,
-        int $maxHits
+        int $maxHits,
+        int $matchAt
     ) {
         $this->matcher = $matcher;
         $this->response = $response;
         $this->throwable = $throwable;
+        $this->matchAt = $matchAt;
         $this->maxHits = $maxHits;
         $this->hits = 0;
+
+        if ($this->maxHits < ($matchAt + 1) && -1 !== $this->maxHits) {
+            $this->maxHits = $matchAt + 1;
+        }
     }
 
     /**
@@ -62,7 +77,10 @@ class Mock implements MockInterface
      */
     public function registerHit(): MockInterface
     {
-        ++$this->hits;
+        if (-1 !== $this->maxHits) {
+            ++$this->hits;
+        }
+
         return $this;
     }
 
@@ -71,15 +89,27 @@ class Mock implements MockInterface
      */
     public function available(): bool
     {
-        return $this->hits < $this->maxHits;
+        return -1 === $this->maxHits || $this->hits < $this->maxHits;
     }
 
     /**
      * @inheritDoc
      */
-    public function getMatcher(): RequestMatcherInterface
+    public function matches(RequestInterface $request): bool
     {
-        return $this->matcher;
+        if ($this->matcher->matches($request)) {
+            if ($this->matchAt <= 0) {
+                return true;
+            }
+
+            if ($this->matchAt === $this->hits) {
+                return true;
+            }
+
+            $this->registerHit();
+        }
+
+        return false;
     }
 
     /**
@@ -101,8 +131,12 @@ class Mock implements MockInterface
     /**
      * @inheritDoc
      */
-    public function getThrowable(): ?Throwable
+    public function getThrowable(RequestInterface $request): ?Throwable
     {
+        if ($this->throwable instanceof PockRequestException || $this->throwable instanceof PockNetworkException) {
+            return $this->throwable->setRequest($request);
+        }
+
         return $this->throwable;
     }
 }
diff --git a/src/MockInterface.php b/src/MockInterface.php
index c0cc2ca..f985e7b 100644
--- a/src/MockInterface.php
+++ b/src/MockInterface.php
@@ -10,6 +10,7 @@
 namespace Pock;
 
 use Pock\Matchers\RequestMatcherInterface;
+use Psr\Http\Message\RequestInterface;
 use Psr\Http\Message\ResponseInterface;
 use Throwable;
 
@@ -36,11 +37,14 @@ interface MockInterface
     public function available(): bool;
 
     /**
-     * Returns matcher for the request.
+     * Returns true if underlying matcher has matched provided request.
+     * It also returns false if matcher has matched request but hits condition is not met yet.
      *
-     * @return \Pock\Matchers\RequestMatcherInterface
+     * @param \Psr\Http\Message\RequestInterface $request
+     *
+     * @return bool
      */
-    public function getMatcher(): RequestMatcherInterface;
+    public function matches(RequestInterface $request): bool;
 
     /**
      * Returns response which should be used as mock data.
@@ -52,7 +56,9 @@ interface MockInterface
     /**
      * Returns the throwable which will be thrown as mock data.
      *
+     * @param \Psr\Http\Message\RequestInterface $request This request may be set into exception if possible
+     *
      * @return \Throwable|null
      */
-    public function getThrowable(): ?Throwable;
+    public function getThrowable(RequestInterface $request): ?Throwable;
 }
diff --git a/src/PockBuilder.php b/src/PockBuilder.php
index f6768e4..0ecf0c4 100644
--- a/src/PockBuilder.php
+++ b/src/PockBuilder.php
@@ -12,6 +12,9 @@ namespace Pock;
 use Diff\ArrayComparer\StrictArrayComparer;
 use Pock\Enum\RequestMethod;
 use Pock\Enum\RequestScheme;
+use Pock\Exception\PockClientException;
+use Pock\Exception\PockNetworkException;
+use Pock\Exception\PockRequestException;
 use Pock\Matchers\AnyRequestMatcher;
 use Pock\Matchers\BodyMatcher;
 use Pock\Matchers\CallbackRequestMatcher;
@@ -45,6 +48,7 @@ use Throwable;
  *
  * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
  * @SuppressWarnings(PHPMD.TooManyPublicMethods)
+ * @SuppressWarnings(PHPMD.TooManyMethods)
  */
 class PockBuilder
 {
@@ -64,6 +68,9 @@ class PockBuilder
     /** @var int */
     private $maxHits;
 
+    /** @var int */
+    private $matchAt;
+
     /** @var \Pock\MockInterface[] */
     private $mocks;
 
@@ -329,6 +336,8 @@ class PockBuilder
      */
     public function repeat(int $hits): self
     {
+        $this->closePrevious();
+
         if ($hits > 0) {
             $this->maxHits = $hits;
         }
@@ -336,6 +345,49 @@ class PockBuilder
         return $this;
     }
 
+    /**
+     * Always execute this mock if matched. Mock with this call will not be expired ever.
+     *
+     * @return self
+     */
+    public function always(): self
+    {
+        $this->closePrevious();
+        $this->maxHits = -1;
+
+        return $this;
+    }
+
+    /**
+     * Match request only at Nth hit. Previous matches will not be executed.
+     *
+     * **Note:** There IS a catch if you use this with the equal mocks. The test Client will not register hit
+     * for the second mock and the second mock will be executed at N+1 time.
+     *
+     * For example, if you try to send 5 requests with this mocks and log response codes:
+     * ```php
+     * $builder = new PockBuilder();
+     *
+     * $builder->matchHost('example.com')->at(2)->reply(200);
+     * $builder->matchHost('example.com')->at(4)->reply(201);
+     * $builder->always()->reply(400);
+     * ```
+     *
+     * You will get this: 400, 400, 200, 400, 400, 201
+     * Instead of this: 400, 400, 200, 400, 201, 400
+     *
+     * @param int $hit
+     *
+     * @return self
+     */
+    public function at(int $hit): self
+    {
+        $this->closePrevious();
+        $this->matchAt = $hit - 1;
+
+        return $this;
+    }
+
     /**
      * Throw an exception when request is being sent.
      *
@@ -350,6 +402,42 @@ class PockBuilder
         return $this;
     }
 
+    /**
+     * Throw an ClientExceptionInterface instance with specified message
+     *
+     * @param string $message
+     *
+     * @return self
+     */
+    public function throwClientException(string $message = 'Pock ClientException'): self
+    {
+        return $this->throwException(new PockClientException($message));
+    }
+
+    /**
+     * Throw an NetworkExceptionInterface instance with specified message
+     *
+     * @param string $message
+     *
+     * @return self
+     */
+    public function throwNetworkException(string $message = 'Pock NetworkException'): self
+    {
+        return $this->throwException(new PockNetworkException($message));
+    }
+
+    /**
+     * Throw an RequestExceptionInterface instance with specified message
+     *
+     * @param string $message
+     *
+     * @return self
+     */
+    public function throwRequestException(string $message = 'Pock RequestException'): self
+    {
+        return $this->throwException(new PockRequestException($message));
+    }
+
     /**
      * @param int $statusCode
      *
@@ -377,6 +465,7 @@ class PockBuilder
         $this->responseBuilder = null;
         $this->throwable = null;
         $this->maxHits = 1;
+        $this->matchAt = -1;
         $this->mocks = [];
 
         return $this;
@@ -421,12 +510,14 @@ class PockBuilder
                 $this->matcher,
                 $response,
                 $this->throwable,
-                $this->maxHits
+                $this->maxHits,
+                $this->matchAt
             );
             $this->matcher = new MultipleMatcher();
             $this->responseBuilder = null;
             $this->throwable = null;
             $this->maxHits = 1;
+            $this->matchAt = -1;
         }
     }
 }
diff --git a/tests/src/PockBuilderTest.php b/tests/src/PockBuilderTest.php
index bd5effc..96800e8 100644
--- a/tests/src/PockBuilderTest.php
+++ b/tests/src/PockBuilderTest.php
@@ -11,14 +11,14 @@ namespace Pock\Tests;
 
 use Pock\Enum\RequestMethod;
 use Pock\Enum\RequestScheme;
-use Pock\Exception\UniversalMockException;
 use Pock\Exception\UnsupportedRequestException;
 use Pock\PockBuilder;
 use Pock\TestUtils\PockTestCase;
 use Pock\TestUtils\SimpleObject;
 use Psr\Http\Client\ClientExceptionInterface;
+use Psr\Http\Client\NetworkExceptionInterface;
+use Psr\Http\Client\RequestExceptionInterface;
 use Psr\Http\Message\RequestInterface;
-use RuntimeException;
 
 /**
  * Class PockBuilderTest
@@ -35,7 +35,7 @@ class PockBuilderTest extends PockTestCase
             ->createRequest(RequestMethod::GET, self::TEST_URI));
     }
 
-    public function testThrowException(): void
+    public function testThrowClientException(): void
     {
         $this->expectException(ClientExceptionInterface::class);
 
@@ -43,7 +43,37 @@ class PockBuilderTest extends PockTestCase
         $builder->matchMethod(RequestMethod::GET)
             ->matchScheme(RequestScheme::HTTPS)
             ->matchHost(self::TEST_HOST)
-            ->throwException(new UniversalMockException('Boom!'));
+            ->throwClientException();
+
+        $builder->getClient()->sendRequest(
+            self::getPsr17Factory()->createRequest(RequestMethod::GET, self::TEST_URI)
+        );
+    }
+
+    public function testThrowNetworkException(): void
+    {
+        $this->expectException(NetworkExceptionInterface::class);
+
+        $builder = new PockBuilder();
+        $builder->matchMethod(RequestMethod::GET)
+            ->matchScheme(RequestScheme::HTTPS)
+            ->matchHost(self::TEST_HOST)
+            ->throwNetworkException();
+
+        $builder->getClient()->sendRequest(
+            self::getPsr17Factory()->createRequest(RequestMethod::GET, self::TEST_URI)
+        );
+    }
+
+    public function testThrowRequestException(): void
+    {
+        $this->expectException(RequestExceptionInterface::class);
+
+        $builder = new PockBuilder();
+        $builder->matchMethod(RequestMethod::GET)
+            ->matchScheme(RequestScheme::HTTPS)
+            ->matchHost(self::TEST_HOST)
+            ->throwRequestException();
 
         $builder->getClient()->sendRequest(
             self::getPsr17Factory()->createRequest(RequestMethod::GET, self::TEST_URI)
@@ -511,4 +541,50 @@ EOF;
         );
         self::assertEquals('Second token (post)', $response->getBody()->getContents());
     }
+
+    public function testAlways(): void
+    {
+        $builder = new PockBuilder();
+        $builder->matchMethod(RequestMethod::GET)
+            ->matchUri(self::TEST_URI)
+            ->always()
+            ->reply(200)
+            ->withHeader('Content-Type', 'text/plain')
+            ->withBody('Successful');
+
+        for ($i = 0; $i < 10; $i++) {
+            $response = $builder->getClient()->sendRequest(
+                self::getPsr17Factory()->createRequest(RequestMethod::GET, self::TEST_URI)
+            );
+
+            self::assertEquals(200, $response->getStatusCode());
+            self::assertEquals(['Content-Type' => ['text/plain']], $response->getHeaders());
+            self::assertEquals('Successful', $response->getBody()->getContents());
+        }
+    }
+
+    public function testAt(): void
+    {
+        $builder = new PockBuilder();
+        $builder->matchMethod(RequestMethod::GET)
+            ->matchUri(self::TEST_URI)
+            ->at(2)
+            ->reply(200);
+
+        $builder->matchMethod(RequestMethod::GET)
+            ->matchUri(self::TEST_URI)
+            ->at(4)
+            ->reply(201);
+
+        $builder->always()->reply(400);
+        $builder->getClient();
+
+        for ($i = 0; $i < 5; $i++) {
+            $response = $builder->getClient()->sendRequest(
+                self::getPsr17Factory()->createRequest(RequestMethod::GET, self::TEST_URI)
+            );
+
+            self::assertEquals(1 === $i ? 200 : (4 === $i ? 201 : 400), $response->getStatusCode());
+        }
+    }
 }