Nemeses Keystone [ROTD-EN029] Super Rare Spellcaster Effect Monster You can only activate 1

You can only activate 1 "Mathmech Equation" per turn

except for the Xyz Summon of a FIRE Warrior-Type monster

do battle damages to your opponent equal to the difference

Set: Dark Revelation Volume 3 Card type: Effect Monster Rarity: Super Rare Attack: 2300 Defense: 1600 While this card is on the field

•Target 1 monster on the field

Nemeses Keystone [ROTD-EN029] Super Rare Spellcaster Effect Monster You can only activate 1Set: Rise of the Duelist Card type: Effect Monster Rarity: Super Rare Attack: 700 Defense: 0 You can target 1 of your banished monsters, except "Nemeses Keystone"; Special Summon this card from your hand, and if you do, shuffle that target into the Deck. During the End Phase, if this card is currently banished, and was banished this turn: You can add this card to your hand. You can only use each effect of "Nemeses Keystone" once per turn.