Spellbook of the Master [CBLZ-EN062] Secret Rare Gold Rare Each 2017 Mega-Tin will also

Each 2017 Mega-Tin will also include additional variant cards (non-randomized)

The ATK and DEF of this card are each 100 points higher than the highest ATK on the field (except "The Wicked Avatar")

inflict damage to your opponent equal to half the current ATK of that monster your opponent controls

but while this effect is applied

Spellbook of the Master [CBLZ-EN062] Secret Rare Gold Rare Each 2017 Mega-Tin will alsoSet: Cosmo Blazer Card type: Normal Spell Rarity: Secret Rare Attack: 0 Defense: 0 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.