Heraldic Beast Twin-Headed Eagle [CBLZ-EN015] Rare

You can banish this card from your Graveyard to target 1 Xyz Monster you control with no Xyz Materials and 2 "Heraldic Beast" monsters in your Graveyard; attach the second targets to the first target as Xyz Materials. You can only use the effect of "Heraldic Beast Twin-Headed Eagle" once per turn.