diff --git a/CHANGELOG.md b/CHANGELOG.md
index c64f9cb..7f51d9b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,9 @@
 - `Innmind\BlackBox\Set::disableShrinking()`
 - `Innmind\BlackBox\Set::toSet()`
 - `Innmind\BlackBox\Set::zip()`
+- `Innmind\BlackBox\Set::properties()`
+- `Innmind\BlackBox\Set::slice()`
+- `Innmind\BlackBox\Set\Provider\Strings::mutuallyExclusive()`
 - `Innmind\BlackBox\Runner\Proof::tagged()`
 - `Innmind\BlackBox\Runner\Proof::disableShrinking()`
 - `Innmind\BlackBox\Application::mapProof()`
@@ -27,6 +30,9 @@
 - PHPUnit attributes `Group` and `DataProvider` are now longer read when running tests with BlackBox, use the `Innmind\BlackBox\` prefixed ones instead
 - All proofs will fail if they throw an exception (instead of stopping the script)
 - `Innmind\BlackBox\Runner\Printer` is now a final class
+- `Innmind\BlackBox\Set\MadeOf` have been moved to `Innmind\BlackBox\Set\Provider\Strings\MadeOf`
+- `Innmind\BlackBox\Set\Properties` have been moved to `Innmind\BlackBox\Set\Provider\Properties`
+- `Innmind\BlackBox\Set\Slice` have been moved to `Innmind\BlackBox\Set\Provider\Slice`
 
 ### Removed
 
@@ -79,6 +85,7 @@
 - `Innmind\BlackBox\Set\Tuple`
 - `Innmind\BlackBox\Set\Type`
 - `Innmind\BlackBox\Set\Unicode`
+- `Innmind\BlackBox\Set\MutuallyExclusive`
 - `Innmind\BlackBox\Set\UnsafeStrings::any()`
 - `Innmind\BlackBox\Set\Uuid`
 - `Innmind\BlackBox\Set::decorate()`
diff --git a/fixtures/proofs.php b/fixtures/proofs.php
index 51846b1..0980215 100644
--- a/fixtures/proofs.php
+++ b/fixtures/proofs.php
@@ -84,7 +84,7 @@
     yield $prove
         ->properties(
             'Counter properties',
-            Set\Properties::any(
+            Set::properties(
                 DownAndUpIsAnIdentityFunction::any(),
                 DownChangeState::any(),
                 LowerBoundAtZero::any(),
diff --git a/proofs/application.php b/proofs/application.php
index 23deeae..32632e3 100644
--- a/proofs/application.php
+++ b/proofs/application.php
@@ -93,7 +93,7 @@
                 ->tryToProve(static function($prove) {
                     yield $prove->properties(
                         'Counter properties',
-                        Set\Properties::any(
+                        Set::properties(
                             DownAndUpIsAnIdentityFunction::any(),
                             DownChangeState::any(),
                             LowerBoundAtZero::any(),
diff --git a/proofs/set/mutuallyExclusive.php b/proofs/set/mutuallyExclusive.php
index d98e005..5b5f823 100644
--- a/proofs/set/mutuallyExclusive.php
+++ b/proofs/set/mutuallyExclusive.php
@@ -8,8 +8,8 @@
 
 return static function($prove) {
     yield $prove
-        ->proof('Set\MutuallyExclusive')
-        ->given(Set\MutuallyExclusive::of(
+        ->proof('Set::strings()->mutuallyExclusive()')
+        ->given(Set::strings()->mutuallyExclusive(
             Set::strings()->madeOf(Set::strings()->unicode()->char(), Set::strings()->chars()),
             Set::strings()->madeOf(Set::strings()->unicode()->char(), Set::strings()->chars()),
             Set::strings()->madeOf(Set::strings()->unicode()->char(), Set::strings()->chars()),
diff --git a/proofs/set/slice.php b/proofs/set/slice.php
index 2a19d79..7dbca3b 100644
--- a/proofs/set/slice.php
+++ b/proofs/set/slice.php
@@ -8,10 +8,10 @@
 
 return static function($prove) {
     yield $prove
-        ->proof('Set\Slice')
+        ->proof('Set::slice()')
         ->given(
             Set::sequence(Set::type())->atLeast(11),
-            Set\Slice::between(10, 20),
+            Set::slice()->between(10, 20),
         )
         ->test(static function($assert, $values, $slice) {
             $subset = $slice($values);
@@ -31,10 +31,10 @@
         ->tag(Tag::ci, Tag::local);
 
     yield $prove
-        ->proof('Set\Slice min length')
+        ->proof('Set::slice() min length')
         ->given(
             Set::sequence(Set::type())->atLeast(2),
-            Set\Slice::any()->atLeast(2),
+            Set::slice()->atLeast(2),
         )
         ->test(static function($assert, $values, $slice) {
             $subset = $slice($values);
diff --git a/src/Set.php b/src/Set.php
index bf5d81c..b76d435 100644
--- a/src/Set.php
+++ b/src/Set.php
@@ -201,6 +201,29 @@ public static function strings(): Provider\Strings
         return Provider\Strings::of(self::build(...));
     }
 
+    /**
+     * @psalm-pure
+     *
+     * @no-named-arguments
+     *
+     * @param self<Property>|Provider<Property> $first
+     * @param self<Property>|Provider<Property> $properties
+     */
+    #[\NoDiscard]
+    public static function properties(self|Provider $first, self|Provider ...$properties): Provider\Properties
+    {
+        return Provider\Properties::any($first, ...$properties);
+    }
+
+    /**
+     * @psalm-pure
+     */
+    #[\NoDiscard]
+    public static function slice(): Provider\Slice
+    {
+        return Provider\Slice::any();
+    }
+
     /**
      * @psalm-pure
      *
diff --git a/src/Set/MutuallyExclusive.php b/src/Set/MutuallyExclusive.php
deleted file mode 100644
index 255fcea..0000000
--- a/src/Set/MutuallyExclusive.php
+++ /dev/null
@@ -1,47 +0,0 @@
-<?php
-declare(strict_types = 1);
-
-namespace Innmind\BlackBox\Set;
-
-use Innmind\BlackBox\Set;
-
-final class MutuallyExclusive
-{
-    /**
-     * @psalm-pure
-     * @no-named-arguments
-     *
-     * @param Set<string>|Provider<string> $first
-     * @param Set<string>|Provider<string> $second
-     * @param Set<string>|Provider<string> $rest
-     *
-     * @return Set<non-empty-list<string>>
-     */
-    #[\NoDiscard]
-    public static function of(
-        Set|Provider $first,
-        Set|Provider $second,
-        Set|Provider ...$rest,
-    ): Set {
-        /** @var Set<non-empty-list<string>> */
-        return Set::tuple(
-            $first,
-            $second,
-            ...$rest,
-        )->filter(static function($strings) {
-            foreach ($strings as $i => $a) {
-                foreach ($strings as $j => $b) {
-                    if ($i === $j) {
-                        continue;
-                    }
-
-                    if (\str_contains(\strtolower($a), \strtolower($b))) {
-                        return false;
-                    }
-                }
-            }
-
-            return true;
-        });
-    }
-}
diff --git a/src/Set/Properties.php b/src/Set/Provider/Properties.php
similarity index 97%
rename from src/Set/Properties.php
rename to src/Set/Provider/Properties.php
index 3c5ba30..28d8c36 100644
--- a/src/Set/Properties.php
+++ b/src/Set/Provider/Properties.php
@@ -1,10 +1,12 @@
 <?php
 declare(strict_types = 1);
 
-namespace Innmind\BlackBox\Set;
+namespace Innmind\BlackBox\Set\Provider;
 
 use Innmind\BlackBox\{
     Set,
+    Set\Provider,
+    Set\Seed,
     Property as Concrete,
     Properties as Ensure,
     Exception\EmptySet,
@@ -25,6 +27,7 @@ private function __construct(private Set|Provider $properties)
     }
 
     /**
+     * @internal
      * @psalm-pure
      *
      * @no-named-arguments
diff --git a/src/Set/Slice.php b/src/Set/Provider/Slice.php
similarity index 93%
rename from src/Set/Slice.php
rename to src/Set/Provider/Slice.php
index 380a4ea..0052b3a 100644
--- a/src/Set/Slice.php
+++ b/src/Set/Provider/Slice.php
@@ -1,10 +1,12 @@
 <?php
 declare(strict_types = 1);
 
-namespace Innmind\BlackBox\Set;
+namespace Innmind\BlackBox\Set\Provider;
 
 use Innmind\BlackBox\{
     Set,
+    Set\Provider,
+    Set\Seed,
     Util\Slice as Util,
     Exception\EmptySet,
 };
@@ -38,15 +40,19 @@ public static function any(): self
     }
 
     /**
-     * @psalm-pure
+     * @psalm-mutation-free
      *
      * @param int<0, max> $min
      * @param int<0, max> $max
      */
     #[\NoDiscard]
-    public static function between(int $min, int $max): self
+    public function between(int $min, int $max): self
     {
-        return new self($min, $max, 0);
+        return new self(
+            $min,
+            $max,
+            $this->atLeast,
+        );
     }
 
     /**
diff --git a/src/Set/Provider/Strings.php b/src/Set/Provider/Strings.php
index 5223394..dd1a242 100644
--- a/src/Set/Provider/Strings.php
+++ b/src/Set/Provider/Strings.php
@@ -75,9 +75,47 @@ public function unsafe(): Set
      * @param Set<string>|Provider<string> $rest
      */
     #[\NoDiscard]
-    public function madeOf(Set|Provider $first, Set|Provider ...$rest): Set\MadeOf
+    public function madeOf(Set|Provider $first, Set|Provider ...$rest): Strings\MadeOf
     {
-        return Set\MadeOf::of($first, ...$rest);
+        return Strings\MadeOf::of($first, ...$rest);
+    }
+
+    /**
+     * @psalm-pure
+     * @no-named-arguments
+     *
+     * @param Set<string>|Provider<string> $first
+     * @param Set<string>|Provider<string> $second
+     * @param Set<string>|Provider<string> $rest
+     *
+     * @return Set<non-empty-list<string>>
+     */
+    #[\NoDiscard]
+    public function mutuallyExclusive(
+        Set|Provider $first,
+        Set|Provider $second,
+        Set|Provider ...$rest,
+    ): Set {
+        /** @var Set<non-empty-list<string>> */
+        return Set::tuple(
+            $first,
+            $second,
+            ...$rest,
+        )->filter(static function($strings) {
+            foreach ($strings as $i => $a) {
+                foreach ($strings as $j => $b) {
+                    if ($i === $j) {
+                        continue;
+                    }
+
+                    if (\str_contains(\strtolower($a), \strtolower($b))) {
+                        return false;
+                    }
+                }
+            }
+
+            return true;
+        });
     }
 
     /**
diff --git a/src/Set/MadeOf.php b/src/Set/Provider/Strings/MadeOf.php
similarity index 97%
rename from src/Set/MadeOf.php
rename to src/Set/Provider/Strings/MadeOf.php
index 08a2a0a..a3c51aa 100644
--- a/src/Set/MadeOf.php
+++ b/src/Set/Provider/Strings/MadeOf.php
@@ -1,10 +1,12 @@
 <?php
 declare(strict_types = 1);
 
-namespace Innmind\BlackBox\Set;
+namespace Innmind\BlackBox\Set\Provider\Strings;
 
 use Innmind\BlackBox\{
     Set,
+    Set\Provider,
+    Set\Seed,
     Exception\EmptySet,
 };
 
@@ -23,6 +25,7 @@ private function __construct(private Set|Provider $chars)
     }
 
     /**
+     * @internal
      * @psalm-pure
      *
      * @no-named-arguments
diff --git a/src/Set/Provider/Strings/Unicode.php b/src/Set/Provider/Strings/Unicode.php
index 5383ac3..f986761 100644
--- a/src/Set/Provider/Strings/Unicode.php
+++ b/src/Set/Provider/Strings/Unicode.php
@@ -7,7 +7,6 @@
     Set,
     Set\Provider,
     Set\Seed,
-    Set\MadeOf,
     Exception\EmptySet,
 };
 
diff --git a/tests/Set/PropertiesTest.php b/tests/Set/PropertiesTest.php
index bae65d4..d506a0d 100644
--- a/tests/Set/PropertiesTest.php
+++ b/tests/Set/PropertiesTest.php
@@ -4,9 +4,8 @@
 namespace Tests\Innmind\BlackBox\Set;
 
 use Innmind\BlackBox\{
-    Set\Properties,
     Set,
-    Properties as PropertiesModel,
+    Properties,
     Random,
     PHPUnit\BlackBox,
 };
@@ -20,7 +19,7 @@ public function testInterface()
     {
         $this->assertInstanceOf(
             Set\Provider::class,
-            Properties::any(
+            Set::properties(
                 Set::of(new LowerBoundAtZero),
             ),
         );
@@ -28,7 +27,7 @@ public function testInterface()
 
     public function testGenerate100ScenariiByDefault()
     {
-        $properties = Properties::any(
+        $properties = Set::properties(
             Set::of(new LowerBoundAtZero),
         );
 
@@ -45,18 +44,18 @@ public function testGenerate100ScenariiByDefault()
 
     public function testGeneratePropertiesModel()
     {
-        $properties = Properties::any(
+        $properties = Set::properties(
             Set::of(new LowerBoundAtZero),
         );
 
         foreach ($properties->toSet()->take(100)->values(Random::mersenneTwister) as $scenario) {
-            $this->assertInstanceOf(PropertiesModel::class, $scenario->unwrap());
+            $this->assertInstanceOf(Properties::class, $scenario->unwrap());
         }
     }
 
     public function testScenariiAreOfDifferentSizes()
     {
-        $properties = Properties::any(
+        $properties = Set::properties(
             Set::of(new LowerBoundAtZero),
         );
         $sizes = [];
@@ -70,7 +69,7 @@ public function testScenariiAreOfDifferentSizes()
 
     public function testTake()
     {
-        $properties = Properties::any(
+        $properties = Set::properties(
             Set::of(new LowerBoundAtZero),
         )->take(100);
         $properties2 = $properties->take(50);
@@ -83,7 +82,7 @@ public function testTake()
 
     public function testFilter()
     {
-        $properties = Properties::any(
+        $properties = Set::properties(
             Set::of(new LowerBoundAtZero),
         );
         $properties2 = $properties->filter(static fn($scenario) => \count($scenario->properties()) > 50);
@@ -111,7 +110,7 @@ public function testFilter()
 
     public function testMaxNumberOfPropertiesGeneratedAtOnce()
     {
-        $properties = Properties::any(
+        $properties = Set::properties(
             Set::of(new LowerBoundAtZero),
         )->atMost(50);
         $sizes = [];