Jam Breeding Machine (DB1-EN229) - Dark Beginning 1 Unlimited

During each of your Standby Phases, Special Summon 1 Slime Token (Aqua-Type/WATER/LEVEL 1/ATK 500/DEF 500) in Attack Position to your side of the field. As long as this card remains face-up on the field, you cannot Normal Summon, Flip Summon or Special Summon any other monster (except Slime Tokens).