* Xantcha, Sleeper Agent - Fixed wording of the replacement effect (Oracle changes from 2019-09-27) and generalized the effect for 3 cards.

Mage/src/main/java/mage/abilities/effects/common/EntersBattlefieldUnderControlOfOpponentOfChoiceEffect.java

@@ -0,0 +1,72 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package mage.abilities.effects.common;
+
+import mage.abilities.Ability;
+import mage.abilities.effects.ContinuousEffect;
+import mage.abilities.effects.OneShotEffect;
+import mage.abilities.effects.common.continuous.GainControlTargetEffect;
+import mage.constants.Duration;
+import mage.constants.Outcome;
+import static mage.constants.Outcome.Benefit;
+import mage.game.Game;
+import mage.game.permanent.Permanent;
+import mage.players.Player;
+import mage.target.Target;
+import mage.target.common.TargetOpponent;
+import mage.target.targetpointer.FixedTarget;
+
+/**
+ * Use this effect only with EntersBattlefieldAbility like abilities
+ *
+ * @author LevelX2
+ */
+
+public class EntersBattlefieldUnderControlOfOpponentOfChoiceEffect extends OneShotEffect {
+
+    public EntersBattlefieldUnderControlOfOpponentOfChoiceEffect() {
+        super(Benefit);
+        staticText = "under the control of an opponent of your choice";
+    }
+
+    private EntersBattlefieldUnderControlOfOpponentOfChoiceEffect(final EntersBattlefieldUnderControlOfOpponentOfChoiceEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public EntersBattlefieldUnderControlOfOpponentOfChoiceEffect copy() {
+        return new EntersBattlefieldUnderControlOfOpponentOfChoiceEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Player controller = game.getPlayer(source.getControllerId());
+        if (controller == null) {
+            return false;
+        }
+        Target target = new TargetOpponent();
+        target.setNotTarget(true);
+        if (!controller.choose(Outcome.Benefit, target, source.getSourceId(), game)) {
+            return false;
+        }
+        Player opponent = game.getPlayer(target.getFirstTarget());
+        if (opponent == null) {
+            return false;
+        }
+        Permanent permanent = game.getPermanentEntering(source.getSourceId());
+        if (permanent != null) {
+            game.informPlayers(permanent.getLogName() + " enters the battlefield under the control of " + opponent.getLogName());
+        }
+        ContinuousEffect continuousEffect = new GainControlTargetEffect(
+                Duration.Custom, true, opponent.getId()
+        );
+        continuousEffect.setTargetPointer(new FixedTarget(
+                source.getSourceId(), source.getSourceObjectZoneChangeCounter()
+        ));
+        game.addEffect(continuousEffect, source);
+        return true;
+    }
+}