Mixousia the Confounder

“1 Spellcaster monster + 1 non-Spellcaster monster You can target 1 face-up monster on the field and declare 1 Attribute; it becomes that Attribute. During your opponent's Main Phase (Quick Effect): You can Fusion Summon 1 Fusion Monster from your Extra Deck, by banishing this card you control and monsters from your field or GY as material. If this card is in your GY: You can declare 1 Attribute; this card in the GY becomes that Attribute until the end of this turn. You can only use each effect of "Mixousia the Confounder" once per turn.”