Spellbook of Life (REDU-EN059) - Return of the Duelist Unlimited Number_LCJW-EN033 inflict the difference as Battle

inflict the difference as Battle Damage to your opponent's Life Points

the ATK/DEF of those changed monsters become 0

during a turn in which you activated a Spell Card

you can Special Summon 1 Level 4 or lower monster from your hand

Spellbook of Life (REDU-EN059) - Return of the Duelist Unlimited Number_LCJW-EN033 inflict the difference as BattleTypenull Normal Spell AttributeSPELL Card TextBanish 1 Spellcaster Type monster from your Graveyard and reveal 1 other "Spellbook" Spell Card in your hand to target 1 Spellcaster Type monster in your Graveyard; Special Summon that target in face up Attack Position and equip it with this card. The equipped monster's Level is increased by the Level of the monster that was banished for this card's activation. You can only activate 1 "Spellbook of Life"