Graydle Parasite

When an opponent's monster declares a direct attack: You can Special Summon 1 "Graydle" monster from your Deck in Attack Position, if you control no monsters. When a "Graydle" monster you control declares a direct attack: You can target 1 monster in your opponent's Graveyard; Special Summon that target to their side of the field, if they control no monsters. You can only use each effect of "Graydle Parasite" once per turn.

Continuous Trap Card trap