diff --git a/src/main/java/uulm/teamname/marvelous/gamelibrary/entities/StoneType.java b/src/main/java/uulm/teamname/marvelous/gamelibrary/entities/StoneType.java
index 909f4f0..f3c042d 100644
--- a/src/main/java/uulm/teamname/marvelous/gamelibrary/entities/StoneType.java
+++ b/src/main/java/uulm/teamname/marvelous/gamelibrary/entities/StoneType.java
@@ -13,20 +13,19 @@ public enum StoneType {
     SoulStone(5);
 
     private final int id;
-    private final static HashMap<Integer, StoneType> map;
+    private final static HashMap<Integer, StoneType> map = new HashMap<>();
 
-    private StoneType(int id) {
+    StoneType(int id) {
         this.id = id;
     }
 
     static {
-        map = new HashMap<>();
-        for (StoneType stoneType : StoneType.values()) {
+        for (StoneType stoneType: StoneType.values()) {
             map.put(stoneType.id, stoneType);
         }
     }
 
-    public static StoneType valueOf (int stoneType) {
+    public static StoneType valueOf(int stoneType) {
         return map.get(stoneType);
     }
 
diff --git a/src/main/java/uulm/teamname/marvelous/gamelibrary/gamelogic/GameLogic.java b/src/main/java/uulm/teamname/marvelous/gamelibrary/gamelogic/GameLogic.java
index 5e2a525..3ef2a4c 100644
--- a/src/main/java/uulm/teamname/marvelous/gamelibrary/gamelogic/GameLogic.java
+++ b/src/main/java/uulm/teamname/marvelous/gamelibrary/gamelogic/GameLogic.java
@@ -94,7 +94,24 @@ class GameLogic {
                                     .buildCharacterEvent());
                         }
                         case MindStone -> {
-                            //TODO: mind stone effect ???????
+                            EntityType target = data.originEntity.type == EntityType.P1 ? EntityType.P2 : EntityType.P1;
+                            Line2D line = new Line2D.Float(data.originField.getX(), data.originField.getY(), data.targetField.getX(), data.targetField.getY());
+                            for(int i = data.originField.getX(); i <= data.targetField.getX(); i++) {
+                                for(int j = data.originField.getY(); j <= data.targetField.getY(); j++) {
+                                    var cell = new Rectangle.Float(i - 0.5f, j - 0.5f, 1, 1);
+                                    if(line.intersects(cell)) {
+                                        for(Entity entity: state.entities.findByPosition(data.targetField)) {
+                                            if(entity.id.isSameType(target)) {
+                                                result.add(new EventBuilder(EventType.TakenDamageEvent)
+                                                        .withTargetEntity(entity.id)
+                                                        .withTargetField(new IntVector2(i, j))
+                                                        .withAmount(data.value)
+                                                        .buildEntityEvent());
+                                            }
+                                        }
+                                    }
+                                }
+                            }
                         }
                         case RealityStone -> {
                             if(data.originEntity == data.targetEntity) { // => place stone
@@ -266,7 +283,10 @@ class GameLogic {
                             }
                         }
                         case MindStone -> {
-                            //TODO: mind stone requirements (config, etc) ???????
+                            if(data.originField == data.targetField) {
+                                throw new InvalidRequestException();
+                            }
+                            //TODO: mind stone damage check (config) ???????
                         }
                         case RealityStone -> {
                             if(data.originEntity == data.targetEntity) { // => place stone