Episode 17 - Back Arrow - Anime News Network
Tae's dreadnought continues its rampage in Rekka. Zetsu pulls Rekka out of the Granedger United talks and heads back to the capital. Once there, Tae unleashes the full might of the battleship on Zetsu but to no avail. The emperor of Rekka uses his Briheight to dispatch Tae and claim the battleship for himself. As the Granedger United talks break down, the leaders of Lutoh return and Peath goes to see Rudolph. Rudolph gifts him with control of yet another flying dreadnought, this one hidden beneath Lutoh itself. Once it rises from the ground, the armies of Lutoh leave to confront the Granedger...
Source: animenewsnetwork.com