Set 2 Field Spell Cards with different names from your Deck on the field (1 on your field, and 1 on your opponent's field). While either of those cards remain Set on the field, neither player can activate or Set other Field Spell Cards.
Near Mint Unlimited - $0.50
Near Mint 1st Edition - $0.60
Lightly Played Unlimited - $0.40
Lightly Played 1st Edition - $0.50
Moderately Played Unlimited - $0.40
Moderately Played 1st Edition - $0.40
Heavily Played Unlimited - $0.30
Heavily Played 1st Edition - $0.30