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 - $17.30
Lightly Played Unlimited - $15.60
Moderately Played Unlimited - $13.90
Heavily Played Unlimited - $8.70
Damaged Unlimited - $7.00