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.
NM-Mint 1st Edition - $0.20
Lightly Played 1st Edition - $0.20
Moderately Played 1st Edition - $0.20
Heavily Played 1st Edition - $0.20
Damaged 1st Edition - $0.10
NM-Mint 1st Edition Non English - $0.20
Lightly Played 1st Edition Non English - $0.20
Moderately Played 1st Edition Non English - $0.20
Heavily Played 1st Edition Non English - $0.20
Damaged 1st Edition Non English - $0.10