During your Standby Phase, if this card is in your hand or GY and your opponent has more cards in their GY than you: You can Special Summon this card
@anonymus: u can also eat a level of scrap dragon, get back eater, then shoot it for scrap effect, afterwards u can get it back again, attacking for 600 more (can make the difference) or if u are looping drill warrior u can get back eater every round for defense oder synching or whatever
Depending on their effects, a Link Monster could gain ATK for every monster in a zone it points to, or protect any monster in a zone it points to from being destroyed
He is the first Dark Signer to be defeated, when he is beaten by Leo and Luna
However, an exception to this came with the introduction of Cyber Dragon Infinity, which was a game-changer for Cyber Dragon players