When you take battle damage from an opponent's attacking monster, while you have 3 or more "Tindangle" monsters with different names in your GY: You can destroy the attacking monster, and if you do, Special Summon 1 "Tindangle Acute Cerberus" from your Extra Deck. If you control no monsters in the Extra Monster Zone: You can banish this card from your GY, then target 3 "Tindangle" monsters with different names in your GY; Special Summon them in face-down Defense Position.