Vidrium the Power Patron of Chaos Extermination

Cannot be Normal Summoned/Set. Must be Special Summoned (from your face-up Extra Deck or GY) by returning 1 Fusion, 1 Synchro, and 1 Xyz Monster from your face-up field and/or GY to the Extra Deck. If this card is added to your Extra Deck face-up: You can add 1 "Power Patron" card from your Deck to your hand. You can only use this effect of "Vidrium the Power Patron of Chaos Extermination" once per turn. If this card is Special Summoned: Banish (face-down) all cards from the GYs. Unaffected by monster effects, except "Power Patron" monsters.