Garunix Eternity, Hyang of the Fire Kings

“2+ Level 8 monsters If this card is Xyz Summoned: You can destroy all other monsters on the field. You can detach 1 material from this card, then target 1 Spell/Trap on the field; destroy it, and if you do, this card gains 500 ATK. If this card is destroyed while it has material: You can Special Summon "Fire King" monsters from your GY, up to the number of materials this card had. You can only use each effect of "Garunix Eternity, Hyang of the Fire Kings" once per turn.”