From a73e0824684f2afc8dab98be330ef7cfb4585802 Mon Sep 17 00:00:00 2001
From: Evan Kranzler <theelk801@gmail.com>
Date: Thu, 5 Sep 2019 21:34:46 -0400
Subject: [PATCH] Implemented The Circle of Loyalty

---
 .../src/mage/cards/t/TheCircleOfLoyalty.java  | 104 ++++++++++++++++++
 Mage.Sets/src/mage/sets/ThroneOfEldraine.java |   1 +
 2 files changed, 105 insertions(+)
 create mode 100644 Mage.Sets/src/mage/cards/t/TheCircleOfLoyalty.java

diff --git a/Mage.Sets/src/mage/cards/t/TheCircleOfLoyalty.java b/Mage.Sets/src/mage/cards/t/TheCircleOfLoyalty.java
new file mode 100644
index 00000000000..3c07a315f14
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/t/TheCircleOfLoyalty.java
@@ -0,0 +1,104 @@
+package mage.cards.t;
+
+import mage.abilities.Ability;
+import mage.abilities.SpellAbility;
+import mage.abilities.common.SimpleActivatedAbility;
+import mage.abilities.common.SimpleStaticAbility;
+import mage.abilities.common.SpellCastControllerTriggeredAbility;
+import mage.abilities.costs.common.TapSourceCost;
+import mage.abilities.costs.mana.ManaCostsImpl;
+import mage.abilities.effects.common.CreateTokenEffect;
+import mage.abilities.effects.common.continuous.BoostControlledEffect;
+import mage.abilities.effects.common.cost.CostModificationEffectImpl;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.*;
+import mage.filter.FilterPermanent;
+import mage.filter.FilterSpell;
+import mage.filter.common.FilterControlledPermanent;
+import mage.filter.predicate.mageobject.SupertypePredicate;
+import mage.game.Game;
+import mage.game.permanent.token.KnightToken;
+import mage.util.CardUtil;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class TheCircleOfLoyalty extends CardImpl {
+
+    private static final FilterSpell filter = new FilterSpell("a legendary spell");
+
+    static {
+        filter.add(new SupertypePredicate(SuperType.LEGENDARY));
+    }
+
+    public TheCircleOfLoyalty(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.ARTIFACT}, "{4}{W}{W}");
+
+        this.addSuperType(SuperType.LEGENDARY);
+
+        // This spell costs {1} less to cast for each Knight you control.
+        this.addAbility(new SimpleStaticAbility(Zone.ALL, new TheCircleOfLoyaltyCostReductionEffect()));
+
+        // Creatures you control get +1/+1.
+        this.addAbility(new SimpleStaticAbility(
+                new BoostControlledEffect(1, 1, Duration.WhileOnBattlefield)
+        ));
+
+        // Whenever you cast a legendary spell, create a 2/2 white Knight creature token with vigilance.
+        this.addAbility(new SpellCastControllerTriggeredAbility(
+                new CreateTokenEffect(new KnightToken()), filter, false
+        ));
+
+        // {3}{W}, {T}: Create a 2/2 white Knight creature token with vigilance.
+        Ability ability = new SimpleActivatedAbility(
+                new CreateTokenEffect(new KnightToken()), new ManaCostsImpl("{3}{W}")
+        );
+        ability.addCost(new TapSourceCost());
+        this.addAbility(ability);
+    }
+
+    private TheCircleOfLoyalty(final TheCircleOfLoyalty card) {
+        super(card);
+    }
+
+    @Override
+    public TheCircleOfLoyalty copy() {
+        return new TheCircleOfLoyalty(this);
+    }
+}
+
+class TheCircleOfLoyaltyCostReductionEffect extends CostModificationEffectImpl {
+
+    private static final FilterPermanent filter = new FilterControlledPermanent(SubType.KNIGHT);
+
+    TheCircleOfLoyaltyCostReductionEffect() {
+        super(Duration.WhileOnStack, Outcome.Benefit, CostModificationType.REDUCE_COST);
+        staticText = "This spell costs {1} less to cast for each Knight you control";
+    }
+
+    private TheCircleOfLoyaltyCostReductionEffect(final TheCircleOfLoyaltyCostReductionEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source, Ability abilityToModify) {
+        int reductionAmount = game.getBattlefield().count(filter, source.getSourceId(), source.getControllerId(), game);
+        CardUtil.reduceCost(abilityToModify, reductionAmount);
+        return true;
+    }
+
+    @Override
+    public boolean applies(Ability abilityToModify, Ability source, Game game) {
+        return abilityToModify instanceof SpellAbility
+                && abilityToModify.getSourceId().equals(source.getSourceId())
+                && game.getCard(abilityToModify.getSourceId()) != null;
+    }
+
+    @Override
+    public TheCircleOfLoyaltyCostReductionEffect copy() {
+        return new TheCircleOfLoyaltyCostReductionEffect(this);
+    }
+}
diff --git a/Mage.Sets/src/mage/sets/ThroneOfEldraine.java b/Mage.Sets/src/mage/sets/ThroneOfEldraine.java
index b0c7bb99f30..c36413b6764 100644
--- a/Mage.Sets/src/mage/sets/ThroneOfEldraine.java
+++ b/Mage.Sets/src/mage/sets/ThroneOfEldraine.java
@@ -64,6 +64,7 @@ public final class ThroneOfEldraine extends ExpansionSet {
         cards.add(new SetCardInfo("Slaying Fire", 143, Rarity.UNCOMMON, mage.cards.s.SlayingFire.class));
         cards.add(new SetCardInfo("Steelbane Hydra", 322, Rarity.RARE, mage.cards.s.SteelbaneHydra.class));
         cards.add(new SetCardInfo("Taste of Death", 320, Rarity.RARE, mage.cards.t.TasteOfDeath.class));
+        cards.add(new SetCardInfo("The Circle of Loyalty", 9, Rarity.MYTHIC, mage.cards.t.TheCircleOfLoyalty.class));
         cards.add(new SetCardInfo("Tome Raider", 68, Rarity.COMMON, mage.cards.t.TomeRaider.class));
         cards.add(new SetCardInfo("Tome of Legends", 332, Rarity.RARE, mage.cards.t.TomeOfLegends.class));
         cards.add(new SetCardInfo("Wishful Merfolk", 73, Rarity.COMMON, mage.cards.w.WishfulMerfolk.class));