Adding a "loseAbilities" keyword per Dr.Solomat's request. The Goal was to code Evil Presence, but I think there is still some work to do to achieve this. The main concern is that (according to the Miki), neither transforms(( nor "becomes(" allow to lose some subtypes. A land enchanted with Evil Presence is supposed to lose its land subtypes. Since we don't support subtypes that good, I don't think this is possible. Additionally, Evil PResence would require to move "{T}:Add{X}" from the basic lands primitives into the rules (which sounds quite easy to do). I've nevertheless tested this on Gaea's Cradle, and it works. (Gaea's Cradle loses its abilities)

projects/mtg/include/ActionLayer.h

@@ -46,6 +46,8 @@ public:
     TargetChooser * getCurrentTargetChooser();
     void setCurrentWaitingAction(ActionElement * ae);
     MTGAbility * getAbility(int type);
+    //Removes from game but does not move the element to garbage. The caller must take care of deleting the element.
+    int removeFromGame(ActionElement * e);
     int moveToGarbage(ActionElement * e);
     int cleanGarbage();
 protected:

projects/mtg/include/AllAbilities.h

@@ -3606,6 +3606,17 @@ public:
     ~APreventDamageTypes();
 };
 
+//Remove all abilities from target
+class ALoseAbilities: public MTGAbility
+{
+public:
+    vector <MTGAbility *> storedAbilities;
+    ALoseAbilities(int id, MTGCardInstance * source, MTGCardInstance * target);
+    int addToGame();
+    int destroy();
+    ALoseAbilities * clone() const;
+};
+
 //Adds types/abilities/P/T to a card (until end of turn)
 class APreventDamageTypesUEOT: public InstantAbility
 {