Activate 1 of these effects. Your opponent takes no further damage this turn.
During this turn, no Summon of a Spellcaster-Type monster can be negated, and when a Spellcaster-Type monster is Summoned, your opponent cannot activate cards or effects.
Target 1 Spellcaster-Type monster you control; if it attacks this turn, your opponent cannot activate cards or effects until the end of the Damage Step.
