Geomathmech Final Sigma
Level 12 FIRE/Cyberse Synchro Effect3000 ATK / 0 DEF
1 Tuner + 1+ non-Tuner monsters
Unaffected by card effects, except "Mathmech" cards, while in the Extra Monster Zone. If this card in the Extra Monster Zone battles an opponent's monster, any battle damage it inflicts to your opponent is doubled. If this card is destroyed by battle, or if this card in its owner's possession is destroyed by an opponent's card effect: You can add 1 "Mathmech" card from your Deck to your hand. You can only use this effect of "Geomathmech Final Sigma" once per turn.
Geomathmech Magma
Level 8 FIRE/Cyberse Synchro Tuner Effect2500 ATK / 0 DEF
1 Tuner + 1+ non-Tuner monsters
When this card destroys a monster by battle: You can target up to 2 cards your opponent controls; destroy them. If this card is destroyed by battle, or if this card in its owner's possession is destroyed by an opponent's card effect: You can add 1 "Mathmech" Spell/Trap from your Deck to your hand. You can only use each effect of "Geomathmech Magma" once per turn.