Ancient Gear Reactor Dragon (Common)

You can Special Summon this card (from your hand) in Defense Position to your zone a Link Monster points to. You can only Special Summon World Legacy - World Crown once per turn this way. When a monster on the field that was Special Summoned from the Extra Deck activates its effect (Quick Effect): You can Tribute this card; negate the activation, and if you do, destroy it. If this Normal Summoned/Set card is Tributed: You can add 1 World Legacy Spell/Trap from your Deck to your hand. You can only use this effect of World Legacy - World Crown once per turn.