If you control a Spellcaster-Type monster and your opponent does not, your opponent cannot activate Spell Cards. If you control no Spellcaster-Type monsters, you cannot activate Spell Cards.
Near Mint Unlimited - $24.20
Lightly Played Unlimited - $23.00
Moderately Played Unlimited - $20.60
Heavily Played Unlimited - $18.10
Damaged Unlimited - $16.90