Each player must send monsters from his/her side of the field to the Graveyard so that he/she only controls 1 Type of face-up monster. As long as this card remains face-up on the field, each player can only Summon or control 1 Type of face-up monster at a time.
Near Mint Unlimited - $0.90
Lightly Played Unlimited - $0.80
Moderately Played Unlimited - $0.70
Heavily Played Unlimited - $0.50
Damaged Unlimited - $0.40