Ultra Assault (超強襲, Chō kyōshū) is a keyword which debuted itself in BS43. Like Great Assault, it is an upgraded version of Assault. The only spirit to possess this ability is the revival version of The DinoDeity Gundinos.
The keyword text reads:
- Ultra Assault: - (When Attacks) After the battle, this spirit can be refreshed by exhausting one of your Nexuses. After that, move 1 core from your opponent's lives to their reserve.