<Dragon World> []:When this unit attacks, [ a rear-guard], and until end of that battle, the unit for this cost and this unit are in the Link Attack state. (Total up the of the units in the Link Attack state) []:At the end of the battle this unit attacked, [], choose one of your rear-guards in the Link Attack state, it, if your opponent's vanguard is grade 3 or greater, choose one of your rear-guards with "Drum" in its card name, and it. My Buddy! - []:[], search your deck or drop for up to one "Drum Bunker Dragon", call it to , and reduce the cost of that unit's original ability by one gauge until end of turn. If you searched the deck, shuffle the deck.