diff --git a/Mage.Sets/src/mage/cards/o/OKagachiVengefulKami.java b/Mage.Sets/src/mage/cards/o/OKagachiVengefulKami.java
new file mode 100644
index 0000000000..c450e83dd0
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/o/OKagachiVengefulKami.java
@@ -0,0 +1,172 @@
+/*
+ *  Copyright 2010 BetaSteward_at_googlemail.com. All rights reserved.
+ *
+ *  Redistribution and use in source and binary forms, with or without modification, are
+ *  permitted provided that the following conditions are met:
+ *
+ *     1. Redistributions of source code must retain the above copyright notice, this list of
+ *        conditions and the following disclaimer.
+ *
+ *     2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *        of conditions and the following disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ *  THIS SOFTWARE IS PROVIDED BY BetaSteward_at_googlemail.com ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ *  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BetaSteward_at_googlemail.com OR
+ *  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ *  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ *  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  The views and conclusions contained in the software and documentation are those of the
+ *  authors and should not be interpreted as representing official policies, either expressed
+ *  or implied, of BetaSteward_at_googlemail.com.
+ */
+package mage.cards.o;
+
+import java.util.HashSet;
+import java.util.Set;
+import java.util.UUID;
+import mage.MageInt;
+import mage.abilities.Ability;
+import mage.abilities.TriggeredAbilityImpl;
+import mage.abilities.effects.OneShotEffect;
+import mage.abilities.keyword.FlyingAbility;
+import mage.abilities.keyword.TrampleAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.Outcome;
+import mage.constants.SuperType;
+import mage.constants.Zone;
+import mage.game.Game;
+import mage.game.events.DamagedPlayerEvent;
+import mage.game.events.GameEvent;
+import mage.game.events.GameEvent.EventType;
+import mage.game.permanent.Permanent;
+import mage.watchers.common.PlayersAttackedLastTurnWatcher;
+import mage.abilities.effects.common.ExileTargetEffect;
+import mage.filter.common.FilterNonlandPermanent;
+import mage.filter.predicate.permanent.ControllerIdPredicate;
+import mage.target.TargetPermanent;
+
+/**
+ *
+ * @author spjspj
+ */
+public class OKagachiVengefulKami extends CardImpl {
+
+    public OKagachiVengefulKami(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{1}{W}{U}{B}{R}{G}");
+
+        addSuperType(SuperType.LEGENDARY);
+        this.subtype.add("Dragon");
+        this.subtype.add("Spirit");
+        this.power = new MageInt(6);
+        this.toughness = new MageInt(6);
+
+        // Flying
+        this.addAbility(FlyingAbility.getInstance());
+
+        // Trample
+        this.addAbility(TrampleAbility.getInstance());
+
+        // Whenever O-Kagachi, Vengeful Kami deals combat damage to a player, if that player attacked you during his or her last turn, exile target nonland permanent that player controls
+        OKagachiVengefulKamiTriggeredAbility ability = new OKagachiVengefulKamiTriggeredAbility();
+        ability.addWatcher(new PlayersAttackedLastTurnWatcher());
+        this.addAbility(ability);
+    }
+
+    public OKagachiVengefulKami(final OKagachiVengefulKami card) {
+        super(card);
+    }
+
+    @Override
+    public OKagachiVengefulKami copy() {
+        return new OKagachiVengefulKami(this);
+    }
+}
+
+class OKagachiVengefulKamiTriggeredAbility extends TriggeredAbilityImpl {
+
+    private boolean madeDamge = false;
+    private Set<UUID> damagedPlayers = new HashSet<>();
+
+    public OKagachiVengefulKamiTriggeredAbility() {
+        super(Zone.BATTLEFIELD, new OKagachiVengefulKamiEffect(), false);
+    }
+
+    public OKagachiVengefulKamiTriggeredAbility(final OKagachiVengefulKamiTriggeredAbility ability) {
+        super(ability);
+        this.madeDamge = ability.madeDamge;
+        this.damagedPlayers = new HashSet<>();
+        this.damagedPlayers.addAll(ability.damagedPlayers);
+    }
+
+    @Override
+    public OKagachiVengefulKamiTriggeredAbility copy() {
+        return new OKagachiVengefulKamiTriggeredAbility(this);
+    }
+
+    @Override
+    public boolean checkEventType(GameEvent event, Game game) {
+        return event.getType() == EventType.DAMAGED_PLAYER;
+    }
+
+    @Override
+    public boolean checkTrigger(GameEvent event, Game game) {
+        if (event.getType() == EventType.DAMAGED_PLAYER) {
+            DamagedPlayerEvent damageEvent = (DamagedPlayerEvent) event;
+            UUID damagedPlayerId = game.getCombat().getDefenderId(sourceId);
+            UUID you = this.getControllerId();
+            Permanent p = game.getPermanent(event.getSourceId());
+            if (damageEvent.isCombatDamage() && p != null) {
+                PlayersAttackedLastTurnWatcher watcher = (PlayersAttackedLastTurnWatcher) game.getState().getWatchers().get(PlayersAttackedLastTurnWatcher.class.getSimpleName());
+                if (watcher != null && watcher.attackedLastTurn(damagedPlayerId, you)) {
+                    FilterNonlandPermanent filter = new FilterNonlandPermanent("nonland permanent defending player controls");
+                    filter.add(new ControllerIdPredicate(damagedPlayerId));
+                    this.getTargets().clear();
+                    TargetPermanent target = new TargetPermanent(filter);
+                    this.addTarget(target);
+
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public String getRule() {
+        return "Whenever {this} deals combat damage to a player, if that player attacked you during his or her last turn, exile target nonland permanent that player controls";
+    }
+}
+
+class OKagachiVengefulKamiEffect extends OneShotEffect {
+
+    public OKagachiVengefulKamiEffect() {
+        super(Outcome.Benefit);
+        this.staticText = "if that player attacked you during his or her last turn, exile target nonland permanent that player controls";
+    }
+
+    public OKagachiVengefulKamiEffect(final OKagachiVengefulKamiEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public OKagachiVengefulKamiEffect copy() {
+        return new OKagachiVengefulKamiEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Permanent permanent = game.getPermanent(source.getSourceId());
+        if (permanent != null) {
+            return new ExileTargetEffect().apply(game, source);
+        }
+        return false;
+    }
+}
diff --git a/Mage.Sets/src/mage/sets/Commander2017.java b/Mage.Sets/src/mage/sets/Commander2017.java
index 2caeab115b..5adec2c0a5 100644
--- a/Mage.Sets/src/mage/sets/Commander2017.java
+++ b/Mage.Sets/src/mage/sets/Commander2017.java
@@ -47,6 +47,7 @@ public class Commander2017 extends ExpansionSet {
         super("Commander 2017 Edition", "C17", ExpansionSet.buildDate(2017, 8, 25), SetType.SUPPLEMENTAL);
         this.blockName = "Command Zone";
 
+        cards.add(new SetCardInfo("O-Kagachi, Vengeful Kami", 3, Rarity.MYTHIC, mage.cards.o.OKagachiVengefulKami.class));
         cards.add(new SetCardInfo("Ramos, Dragon Engine", 55, Rarity.MYTHIC, mage.cards.r.RamosDragonEngine.class));
 
     }
diff --git a/Mage/src/main/java/mage/watchers/common/PlayersAttackedLastTurnWatcher.java b/Mage/src/main/java/mage/watchers/common/PlayersAttackedLastTurnWatcher.java
new file mode 100644
index 0000000000..5bae3c01da
--- /dev/null
+++ b/Mage/src/main/java/mage/watchers/common/PlayersAttackedLastTurnWatcher.java
@@ -0,0 +1,89 @@
+/*
+ *  Copyright 2010 BetaSteward_at_googlemail.com. All rights reserved.
+ *
+ *  Redistribution and use in source and binary forms, with or without modification, are
+ *  permitted provided that the following conditions are met:
+ *
+ *     1. Redistributions of source code must retain the above copyright notice, this list of
+ *        conditions and the following disclaimer.
+ *
+ *     2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *        of conditions and the following disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ *  THIS SOFTWARE IS PROVIDED BY BetaSteward_at_googlemail.com ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ *  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BetaSteward_at_googlemail.com OR
+ *  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ *  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ *  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  The views and conclusions contained in the software and documentation are those of the
+ *  authors and should not be interpreted as representing official policies, either expressed
+ *  or implied, of BetaSteward_at_googlemail.com.
+ */
+package mage.watchers.common;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.UUID;
+
+import mage.constants.WatcherScope;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.watchers.Watcher;
+import mage.players.PlayerList;
+
+/**
+ * @author spjspj
+ */
+public class PlayersAttackedLastTurnWatcher extends Watcher {
+
+    // Store how many players each player attacked in their last turn 
+    private final Map<UUID, PlayerList> playersAttackedInLastTurn = new HashMap<>();
+
+    public PlayersAttackedLastTurnWatcher() {
+        super(PlayersAttackedLastTurnWatcher.class.getSimpleName(), WatcherScope.GAME);
+    }
+
+    public PlayersAttackedLastTurnWatcher(final PlayersAttackedLastTurnWatcher watcher) {
+        super(watcher);
+        for (Map.Entry<UUID, PlayerList> entry : watcher.playersAttackedInLastTurn.entrySet()) {
+            this.playersAttackedInLastTurn.put(entry.getKey(), entry.getValue());
+        }
+    }
+
+    @Override
+    public PlayersAttackedLastTurnWatcher copy() {
+        return new PlayersAttackedLastTurnWatcher(this);
+    }
+
+    @Override
+    public void watch(GameEvent event, Game game) {
+        if (event.getType() == GameEvent.EventType.BEGINNING_PHASE_PRE) {
+            playersAttackedInLastTurn.remove(event.getPlayerId());
+        }
+
+        if (event.getType() == GameEvent.EventType.ATTACKER_DECLARED) {
+            PlayerList playersAttacked = playersAttackedInLastTurn.get(event.getPlayerId());
+            if (playersAttacked == null) {
+                playersAttacked = new PlayerList();
+            }
+            UUID defender = game.getCombat().getDefendingPlayerId(event.getSourceId(), game);
+            if (defender != null) {
+                playersAttacked.add(defender);
+            }
+            playersAttackedInLastTurn.put(event.getPlayerId(), playersAttacked);
+        }
+    }
+
+    public boolean attackedLastTurn(UUID playerId, UUID otherPlayerId) {
+        if (playersAttackedInLastTurn.get(playerId) != null) {
+            return playersAttackedInLastTurn.get(playerId).contains(otherPlayerId);
+        }
+        return false;
+    }
+}