[ONE] Implement Elesh Norn, Mother of Machines (#9811)

Co-authored-by: Evan Kranzler <theelk801@gmail.com>

Mage.Sets/src/mage/cards/e/EleshNornMotherOfMachines.java

@@ -0,0 +1,146 @@
+package mage.cards.e;
+
+import mage.MageInt;
+import mage.MageObject;
+import mage.abilities.Ability;
+import mage.abilities.TriggeredAbility;
+import mage.abilities.common.SimpleStaticAbility;
+import mage.abilities.effects.ContinuousRuleModifyingEffectImpl;
+import mage.abilities.effects.ReplacementEffectImpl;
+import mage.abilities.keyword.VigilanceAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.*;
+import mage.game.Game;
+import mage.game.events.EntersTheBattlefieldEvent;
+import mage.game.events.GameEvent;
+import mage.game.events.NumberOfTriggersEvent;
+import mage.game.permanent.Permanent;
+
+import java.util.UUID;
+
+/**
+ * @author PurpleCrowbar
+ */
+public final class EleshNornMotherOfMachines extends CardImpl {
+
+    public EleshNornMotherOfMachines(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{4}{W}");
+
+        this.addSuperType(SuperType.LEGENDARY);
+        this.subtype.add(SubType.PHYREXIAN, SubType.PRAETOR);
+        this.power = new MageInt(4);
+        this.toughness = new MageInt(7);
+
+        // Vigilance
+        this.addAbility(VigilanceAbility.getInstance());
+
+        // If a permanent entering the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.
+        this.addAbility(new SimpleStaticAbility(Zone.BATTLEFIELD, new EleshNornMotherOfMachinesDoublingEffect()));
+
+        // Permanents entering the battlefield don't cause abilities of permanents your opponents control to trigger.
+        this.addAbility(new SimpleStaticAbility(Zone.BATTLEFIELD, new EleshNornMotherOfMachinesPreventionEffect()));
+    }
+
+    private EleshNornMotherOfMachines(final EleshNornMotherOfMachines card) {super(card);}
+
+    @Override
+    public EleshNornMotherOfMachines copy() {return new EleshNornMotherOfMachines(this);}
+}
+
+class EleshNornMotherOfMachinesDoublingEffect extends ReplacementEffectImpl {
+
+    EleshNornMotherOfMachinesDoublingEffect() {
+        super(Duration.WhileOnBattlefield, Outcome.Benefit);
+        staticText = "If a permanent entering the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time";
+    }
+
+    EleshNornMotherOfMachinesDoublingEffect(final EleshNornMotherOfMachinesDoublingEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public EleshNornMotherOfMachinesDoublingEffect copy() {
+        return new EleshNornMotherOfMachinesDoublingEffect(this);
+    }
+
+    @Override
+    public boolean checksEventType(GameEvent event, Game game) {
+        return event.getType() == GameEvent.EventType.NUMBER_OF_TRIGGERS;
+    }
+
+    @Override
+    public boolean applies(GameEvent event, Ability source, Game game) {
+        if (event instanceof NumberOfTriggersEvent) {
+            NumberOfTriggersEvent numberOfTriggersEvent = (NumberOfTriggersEvent) event;
+            // Only triggers of the controller of Elesh Norn
+            if (source.isControlledBy(event.getPlayerId())) {
+                GameEvent sourceEvent = numberOfTriggersEvent.getSourceEvent();
+                // Only EtB triggers
+                if (sourceEvent != null
+                        && sourceEvent.getType() == GameEvent.EventType.ENTERS_THE_BATTLEFIELD
+                        && sourceEvent instanceof EntersTheBattlefieldEvent) {
+                    EntersTheBattlefieldEvent entersTheBattlefieldEvent = (EntersTheBattlefieldEvent) sourceEvent;
+                    // Only for triggers of permanents
+                    if (game.getPermanent(numberOfTriggersEvent.getSourceId()) != null) {
+                        return true;
+                    }
+                }
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public boolean replaceEvent(GameEvent event, Ability source, Game game) {
+        event.setAmount(event.getAmount() + 1);
+        return false;
+    }
+}
+
+class EleshNornMotherOfMachinesPreventionEffect extends ContinuousRuleModifyingEffectImpl {
+
+    EleshNornMotherOfMachinesPreventionEffect() {
+        super(Duration.WhileOnBattlefield, Outcome.Detriment, false, false);
+        staticText = "Permanents entering the battlefield don't cause abilities of permanents your opponents control to trigger";
+    }
+
+    EleshNornMotherOfMachinesPreventionEffect(final EleshNornMotherOfMachinesPreventionEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public EleshNornMotherOfMachinesPreventionEffect copy() {return new EleshNornMotherOfMachinesPreventionEffect(this);}
+
+    @Override
+    public boolean checksEventType(GameEvent event, Game game) {
+        return event.getType() == GameEvent.EventType.ENTERS_THE_BATTLEFIELD;
+    }
+
+    @Override
+    public boolean applies(GameEvent event, Ability source, Game game) {
+        Ability ability = (Ability) getValue("targetAbility");
+        if (ability != null && ability.getAbilityType() == AbilityType.TRIGGERED && game.getOpponents(source.getControllerId()).contains(ability.getControllerId())) {
+            Permanent enteringPermanent = ((EntersTheBattlefieldEvent) event).getTarget();
+            if (enteringPermanent != null) {
+                return (((TriggeredAbility) ability).checkTrigger(event, game));
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public String getInfoMessage(Ability source, GameEvent event, Game game) {
+        MageObject enteringObject = game.getObject(event.getSourceId());
+        MageObject sourceObject = game.getObject(source);
+        Ability ability = (Ability) getValue("targetAbility");
+        if (enteringObject != null && sourceObject != null && ability != null) {
+            MageObject abilitObject = game.getObject(ability.getSourceId());
+            if (abilitObject != null) {
+                return sourceObject.getLogName() + " prevented ability of " + abilitObject.getLogName()
+                        + " to trigger for " + enteringObject.getLogName() + " entering the battlefield.";
+            }
+        }
+        return null;
+    }
+}