diff --git a/dECS/CMakeLists.txt b/dECS/CMakeLists.txt
index c100db7e..f5dce280 100644
--- a/dECS/CMakeLists.txt
+++ b/dECS/CMakeLists.txt
@@ -5,6 +5,7 @@ add_library(dECS STATIC
     "Core.h"
     "Iter.h"
     "Core.cpp"
+    "System.cpp"
 )
 target_include_directories(dECS PUBLIC .)
 target_link_libraries(dECS PRIVATE dCommon magic_enum::magic_enum)
diff --git a/dECS/System.cpp b/dECS/System.cpp
new file mode 100644
index 00000000..88ea1f7f
--- /dev/null
+++ b/dECS/System.cpp
@@ -0,0 +1,52 @@
+#include "PetComponent.h"
+#include "MovementAIComponent.h"
+#include "MissionComponent.h"
+#include "eMissionState.h"
+
+using Pet = PetComponent;
+using Mission = MissionComponent;
+using MovementAI = MovementAIComponent;
+
+struct Position : NiPoint3 {};
+struct Treasure {};
+
+namespace decs {
+    template <typename... Cs>
+    class System {
+    public:
+        template <typename Fn>
+        void each(Fn&& fn) {
+            fn();
+        }
+    };
+
+    class Scene {
+    public:
+        template <typename... Cs>
+        System<Cs...> system() {
+            return System<Cs...>{};
+        }
+    };
+}
+
+void run() {
+    auto scene = decs::Scene{};
+
+    scene.system<Pet>()
+        .each([](Pet& pet) {
+
+        });
+
+    scene.system<Pet, MovementAI>()
+        .each([](Pet& pet, MovementAI& move) {
+
+        });
+
+    scene.system<Pet, const Mission, const Position>()
+        .each([](Pet& pet, Mission const& mission, Position const& pos) {
+            auto const digUnlocked = mission.GetMissionState(842) == eMissionState::COMPLETE;
+            auto const treasurePos = PetDigServer::GetClosestTreasure(pos);
+
+
+        });
+}