Spellbook of the Master (CBLZ-EN062) - Cosmo Blazer Unlimited

If you control a Spellcaster-Type monster: You can reveal 1 other "Spellbook" card in your hand to target 1 "Spellbook" Normal Spell Card in your Graveyard, except "Spellbook of the Master"; this card's effect becomes that target's effect. You can only activate 1 "Spellbook of the Master" per turn.