multiple changes:

* refactor: improved target pointer init code and logic, added docs and runtime checks;
* game: fixed miss or wrong init calls in some continuous effects;
* game: fixed wrong usage of target pointers (miss copy code, miss npe checks);

Mage/src/main/java/mage/abilities/effects/ContinuousEffect.java

@@ -39,6 +39,11 @@ public interface ContinuousEffect extends Effect {
 
     boolean isInactive(Ability source, Game game);
 
+    /**
+     * Init ability data like ZCC or targets on first check in game cycle (ApplyEffects)
+     * <p>
+     * Warning, if you setup target pointer in init then must call super.init at the end (after all choices)
+     */
     void init(Ability source, Game game);
 
     void init(Ability source, Game game, UUID activePlayerId);