Worm Yagan

If the only monster you control is "Worm Xex", you can Special Summon this card from your Graveyard in face-down Defense Position. If you do, remove it from play when it is removed from the field. When this card is flipped face-up, select 1 face-up monster your opponent controls, and return it to it's owner's hand.

Reptile LIGHT Effect Monster 4 effect