OCG Rulings

• This effect targets 1 face-up Spellcaster-Type monster on the field.^[1]

• This card cannot be activated during the Damage Step.^[1]

• You choose which effect to apply upon activation.^[1]

References

1. ↑ ^{1.0 1.1 1.2} Konami OCG Card Database: Spellbook of Wisdom