Demon Wolf, Fenrir "Re:B"

■ [Call Cost] [Pay 4 gauge]

■ When this card is dropped from your hand, you may pay 2 gauge. If you do, call this card from your drop zone without paying its [Call Cost], and this card becomes size 0 until it leaves the field.

■ At the end of the battle that this card attacked, if you have no cards in your hand, for this turn, this card gets Triple Attack.