[WOE] Implement Virtue of Knowledge (#10855)

Mage/src/main/java/mage/abilities/effects/common/replacement/AdditionalTriggerControlledETBReplacementEffect.java

@@ -0,0 +1,63 @@
+package mage.abilities.effects.common.replacement;
+
+import mage.abilities.Ability;
+import mage.abilities.effects.ReplacementEffectImpl;
+import mage.constants.Duration;
+import mage.constants.Outcome;
+import mage.game.Game;
+import mage.game.events.EntersTheBattlefieldEvent;
+import mage.game.events.GameEvent;
+import mage.game.events.NumberOfTriggersEvent;
+
+/**
+ * @author TheElk801
+ */
+public class AdditionalTriggerControlledETBReplacementEffect extends ReplacementEffectImpl {
+
+    public AdditionalTriggerControlledETBReplacementEffect() {
+        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";
+    }
+
+    private AdditionalTriggerControlledETBReplacementEffect(final AdditionalTriggerControlledETBReplacementEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public AdditionalTriggerControlledETBReplacementEffect copy() {
+        return new AdditionalTriggerControlledETBReplacementEffect(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)) {
+            return false;
+        }
+        NumberOfTriggersEvent numberOfTriggersEvent = (NumberOfTriggersEvent) event;
+        // Only triggers for the source controller
+        if (!source.isControlledBy(event.getPlayerId())) {
+            return false;
+        }
+        GameEvent sourceEvent = numberOfTriggersEvent.getSourceEvent();
+        // Only EtB triggers
+        if (sourceEvent == null
+                || sourceEvent.getType() != GameEvent.EventType.ENTERS_THE_BATTLEFIELD
+                || !(sourceEvent instanceof EntersTheBattlefieldEvent)) {
+            return false;
+        }
+        // Only for triggers of permanents
+        return game.getPermanent(numberOfTriggersEvent.getSourceId()) != null;
+    }
+
+    @Override
+    public boolean replaceEvent(GameEvent event, Ability source, Game game) {
+        event.setAmount(event.getAmount() + 1);
+        return false;
+    }
+}