Allow activating equip ability

Mage/src/main/java/mage/abilities/effects/EquipEffect.java

@@ -0,0 +1,39 @@
+package mage.abilities.effects;
+
+import mage.abilities.Ability;
+import mage.abilities.effects.common.AttachEffect;
+import mage.constants.Outcome;
+import mage.constants.SubType;
+import mage.game.Game;
+import mage.game.permanent.Permanent;
+
+public class EquipEffect extends AttachEffect {
+
+    public EquipEffect(Outcome outcome) {
+        super(outcome, "Equip");
+    }
+
+    public EquipEffect(EquipEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Permanent sourcePermanent = game.getPermanent(source.getSourceId());
+        //301.5c An Equipment that’s also a creature can’t equip a creature. An Equipment that loses the subtype
+        // “Equipment” can’t equip a creature. An Equipment can’t equip itself. An Equipment that equips an illegal or
+        // nonexistent permanent becomes unattached from that permanent but remains on the battlefield. (This is a
+        // state-based action. See rule 704.) An Equipment can’t equip more than one creature. If a spell or ability
+        // would cause an Equipment to equip more than one creature, the Equipment’s controller chooses which creature
+        // it equips.
+        if (sourcePermanent != null && sourcePermanent.hasSubtype(SubType.EQUIPMENT, game) && !sourcePermanent.isCreature()) {
+            return super.apply(game, source);
+        }
+        return false;
+    }
+
+    @Override
+    public EquipEffect copy(){
+        return new EquipEffect(this);
+    }
+}