Ancient Gear Factory (DR04-EN159) - Dark Revelation Volume 4 Unlimited

Select 1 monster in your hand that includes Ancient Gear in its card name (show the monster to your opponent). Remove from play cards in your Graveyard that include Ancient Gear in their card name(s) whose total Levels are equal to double the selected card''s. You don''t have to Tribute when you Normal Summon the selected card this turn.