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 - $2.70
Near Mint 1st Edition - $16.00
Lightly Played Unlimited - $2.60
Lightly Played 1st Edition - $15.20
Moderately Played Unlimited - $2.30
Moderately Played 1st Edition - $13.60
Played Unlimited - $1.80
Played 1st Edition - $10.40