Salamangreat Zebroid X

While this card is in your GY, if a "Salamangreat" Link Monster you control leaves the field because of an opponent's card effect (except during the Damage Step): You can Special Summon 2 Level 4 "Salamangreat" monsters from your GY, including this card, but negate their effects, and if you do, immediately after this effect resolves, Xyz Summon 1 "Salamangreat" Xyz Monster, using only those 2 monsters. You can only use this effect of "Salamangreat Zebroid X" once per turn. An Xyz Monster that was Summoned using this card on the field as material gains this effect. ● This card gains 300 ATK for each material attached to it.