[SPM] Implement Oscorp Industries

Mage/src/main/java/mage/abilities/keyword/MayhemLandAbility.java

@@ -0,0 +1,60 @@
+package mage.abilities.keyword;
+
+import mage.MageIdentifier;
+import mage.abilities.PlayLandAbility;
+import mage.cards.Card;
+import mage.constants.Zone;
+import mage.game.Game;
+
+import java.util.Set;
+import java.util.UUID;
+
+public  class MayhemLandAbility extends PlayLandAbility {
+
+        private final String rule;
+
+        public MayhemLandAbility(Card card) {
+            super(card.getName());
+            this.zone = Zone.GRAVEYARD;
+            this.newId();
+            this.name += " with Mayhem";
+            this.addWatcher(new MayhemWatcher());
+            this.setRuleAtTheTop(true);
+            this.rule = "Mayhem " +
+                    " <i>(You may play this card from your graveyard if you discarded it this turn. " +
+                    "Timing rules still apply.)</i>";
+        }
+
+        protected MayhemLandAbility(final MayhemLandAbility ability) {
+            super(ability);
+            this.rule = ability.rule;
+        }
+
+        @Override
+        public ActivationStatus canActivate(UUID playerId, Game game) {
+            if (!Zone.GRAVEYARD.match(game.getState().getZone(getSourceId()))
+                    || !MayhemWatcher.checkCard(getSourceId(), game)) {
+                return ActivationStatus.getFalse();
+            }
+            return super.canActivate(playerId, game);
+        }
+
+        @Override
+        public boolean activate(Game game, Set<MageIdentifier> allowedIdentifiers, boolean noMana) {
+            if (!super.activate(game, allowedIdentifiers, noMana)) {
+                return false;
+            }
+            this.setCostsTag(MayhemAbility.MAYHEM_ACTIVATION_VALUE_KEY, null);
+            return true;
+        }
+
+        @Override
+        public MayhemLandAbility copy() {
+            return new MayhemLandAbility(this);
+        }
+
+        @Override
+        public String getRule() {
+            return rule;
+        }
+    }