معمل الجي نو م #5

Your opponent cannot activate cards or effects when you Normal or Special Summon a "GMX" monster(s). During your Main Phase: You can Set 1 "GMX" Spell/Trap from your Deck, except "GMX Lab #5", then place 1 card from your hand on top of the Deck. You can only use this effect of "GMX Lab #5" once per turn.