From 8684eb2b3ce3db90c5a3d55f9df0c9e36e02d752 Mon Sep 17 00:00:00 2001
From: Noah Gleason <noah.gleason1@gmail.com>
Date: Sun, 1 Jul 2018 22:05:43 -0400
Subject: [PATCH] Implement Cover of Winter

---
 Mage.Sets/src/mage/cards/c/CoverOfWinter.java | 102 ++++++++++++++++++
 Mage.Sets/src/mage/sets/Coldsnap.java         |   1 +
 2 files changed, 103 insertions(+)
 create mode 100644 Mage.Sets/src/mage/cards/c/CoverOfWinter.java

diff --git a/Mage.Sets/src/mage/cards/c/CoverOfWinter.java b/Mage.Sets/src/mage/cards/c/CoverOfWinter.java
new file mode 100644
index 0000000000..5497f041bb
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/c/CoverOfWinter.java
@@ -0,0 +1,102 @@
+package mage.cards.c;
+
+import java.util.UUID;
+
+import mage.abilities.Ability;
+import mage.abilities.common.SimpleActivatedAbility;
+import mage.abilities.common.SimpleStaticAbility;
+import mage.abilities.effects.PreventionEffectData;
+import mage.abilities.effects.PreventionEffectImpl;
+import mage.abilities.effects.common.counter.AddCountersSourceEffect;
+import mage.constants.Duration;
+import mage.constants.SuperType;
+import mage.abilities.costs.mana.ManaCostsImpl;
+import mage.abilities.keyword.CumulativeUpkeepAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.Zone;
+import mage.counters.CounterType;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.permanent.Permanent;
+
+/**
+ *
+ * @author noahg
+ */
+public final class CoverOfWinter extends CardImpl {
+
+    public CoverOfWinter(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.ENCHANTMENT}, "{2}{W}");
+        
+        this.addSuperType(SuperType.SNOW);
+
+        // Cumulative upkeep {S}
+        this.addAbility(new CumulativeUpkeepAbility(new ManaCostsImpl("{S}")));
+
+        // If a creature would deal combat damage to you and/or one or more creatures you control, prevent X of that damage, where X is the number of age counters on Cover of Winter.
+        this.addAbility(new SimpleStaticAbility(Zone.BATTLEFIELD, new CoverOfWinterEffect()));
+
+        // {S}: Put an age counter on Cover of Winter.
+        this.addAbility(new SimpleActivatedAbility(new AddCountersSourceEffect(CounterType.AGE.createInstance()), new ManaCostsImpl("{S}")));
+    }
+
+    public CoverOfWinter(final CoverOfWinter card) {
+        super(card);
+    }
+
+    @Override
+    public CoverOfWinter copy() {
+        return new CoverOfWinter(this);
+    }
+}
+
+class CoverOfWinterEffect extends PreventionEffectImpl {
+
+    public CoverOfWinterEffect() {
+        super(Duration.WhileOnBattlefield, -1, true);
+        this.staticText = "If a creature would deal combat damage to you and/or one or more creatures you control, prevent X of that damage, where X is the number of age counters on {this}";
+    }
+
+    public CoverOfWinterEffect(CoverOfWinterEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public boolean checksEventType(GameEvent event, Game game) {
+        return event.getType() == GameEvent.EventType.DAMAGE_PLAYER || event.getType() == GameEvent.EventType.DAMAGE_CREATURE;
+    }
+
+    @Override
+    protected PreventionEffectData preventDamageAction(GameEvent event, Ability source, Game game) {
+        Permanent sourcePermanent = source.getSourcePermanentIfItStillExists(game);
+        if (sourcePermanent != null) {
+            return game.preventDamage(event, source, game, sourcePermanent.getCounters(game).getCount(CounterType.AGE));
+        } else {
+            this.discard();
+            return game.preventDamage(event, source, game, 0);
+        }
+    }
+
+    @Override
+    public boolean applies(GameEvent event, Ability source, Game game) {
+        if (event.getType() == GameEvent.EventType.DAMAGE_PLAYER
+                && event.getTargetId().equals(source.getControllerId())) {
+            return super.applies(event, source, game);
+        }
+
+        if (event.getType() == GameEvent.EventType.DAMAGE_CREATURE) {
+            Permanent permanent = game.getPermanent(event.getTargetId());
+            if (permanent != null && permanent.getControllerId().equals(source.getControllerId())) {
+                return super.applies(event, source, game);
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public CoverOfWinterEffect copy() {
+        return new CoverOfWinterEffect(this);
+    }
+}
\ No newline at end of file
diff --git a/Mage.Sets/src/mage/sets/Coldsnap.java b/Mage.Sets/src/mage/sets/Coldsnap.java
index 6fbb6b7f9d..a0f628dcc9 100644
--- a/Mage.Sets/src/mage/sets/Coldsnap.java
+++ b/Mage.Sets/src/mage/sets/Coldsnap.java
@@ -52,6 +52,7 @@ public final class Coldsnap extends ExpansionSet {
         cards.add(new SetCardInfo("Commandeer", 29, Rarity.RARE, mage.cards.c.Commandeer.class));
         cards.add(new SetCardInfo("Controvert", 30, Rarity.UNCOMMON, mage.cards.c.Controvert.class));
         cards.add(new SetCardInfo("Counterbalance", 31, Rarity.UNCOMMON, mage.cards.c.Counterbalance.class));
+        cards.add(new SetCardInfo("Cover of Winter", 3, Rarity.RARE, mage.cards.c.CoverOfWinter.class));
         cards.add(new SetCardInfo("Cryoclasm", 79, Rarity.UNCOMMON, mage.cards.c.Cryoclasm.class));
         cards.add(new SetCardInfo("Darien, King of Kjeldor", 4, Rarity.RARE, mage.cards.d.DarienKingOfKjeldor.class));
         cards.add(new SetCardInfo("Dark Depths", 145, Rarity.RARE, mage.cards.d.DarkDepths.class));