Black arc dragon, Riverpain (RRR)
1
[Call Cost] [Pay 1 gauge] [Counter] 【Act】 "Black Thunder Summon" During the attack phase, destroy a monster on your field. If you do, call up to one 《Black Dragon》 or 《Thunder Empire》 monster from your hand by paying its [Call Cost]. You may only use "Black Thunder Summon" once per turn. When this card enters the field, destroy a monster on your opponent's field. [Double Attack]