Fifth Omni Oath, Dragoundertake (H-BT03/0025EN) (H-BT03)

You may only cast this card if you have an item equipped, you have a buddy monster or a monster with "Drum" in its card name on your field, and neither you nor your opponent has a monster in the center.
[Cast Cost] [Pay 3 gauge]
Choose a monster on your field, and deal damage to your opponent equal to the sum of the critical of that monster and the critical of an item on your field!! The damage dealt by this card cannot be reduced.