Reactor Slime (EGS1-EN020) - Egyptian God Deck: Slifer the Sky Dragon 1st Edition

During your Main Phase: You can activate this effect; Special Summon 2 "Slime Tokens" (Aqua/WATER/Level 1/ATK 500/DEF 500), also you cannot Normal or Special Summon monsters for the rest of this turn, except Divine-Beast monsters. During the Battle Phase (Quick Effect): You can Tribute this card; Set 1 "Metal Reflect Slime" from your hand, Deck, or GY. It can be activated this turn. You can only use each effect of "Reactor Slime" once per turn.