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 - $6.20
Lightly Played Unlimited - $5.50
Moderately Played Unlimited - $4.90
Heavily Played Unlimited - $4.30
Damaged Unlimited - $3.70