[MSH] Implement Quicksilver, Brash Blur

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

@@ -0,0 +1,53 @@
+package mage.abilities.keyword;
+
+import mage.abilities.Ability;
+import mage.abilities.ActivatedAbilityImpl;
+import mage.abilities.costs.Cost;
+import mage.abilities.costs.CostAdjuster;
+import mage.abilities.effects.Effect;
+import mage.constants.Zone;
+import mage.game.Game;
+import mage.game.permanent.Permanent;
+import mage.util.CardUtil;
+
+/**
+ * @author TheElk801
+ */
+public class PowerUpAbility extends ActivatedAbilityImpl {
+
+    private enum PowerUpAbilityAdjuster implements CostAdjuster {
+        instance;
+
+        @Override
+        public void reduceCost(Ability ability, Game game) {
+            Permanent permanent = ability.getSourcePermanentIfItStillExists(game);
+            if (permanent != null && permanent.getTurnsOnBattlefield() == 0) {
+                CardUtil.adjustCost(ability, permanent.getManaCost(), false);
+            }
+        }
+    }
+
+    public PowerUpAbility(Effect effect, Cost cost) {
+        this(Zone.BATTLEFIELD, effect, cost);
+        this.maxActivationsPerGame = 1;
+        this.setCostAdjuster(PowerUpAbilityAdjuster.instance);
+    }
+
+    public PowerUpAbility(Zone zone, Effect effect, Cost cost) {
+        super(zone, effect, cost);
+    }
+
+    private PowerUpAbility(final PowerUpAbility ability) {
+        super(ability);
+    }
+
+    @Override
+    public PowerUpAbility copy() {
+        return new PowerUpAbility(this);
+    }
+
+    @Override
+    public String getRule() {
+        return "Power-up — " + super.getRule();
+    }
+}