Apply 1 of these effects. Your opponent takes no damage this turn. *This turn, the Summons of Spellcaster-Type monsters cannot be negated, and when a Spellcaster-Type monster is Summoned, your opponent cannot activate cards or effects. *Target 1 face-up Spellcaster-Type monster on the field; if it attacks this turn, your opponent cannot activate cards or effects until the end of the Damage Step.