To be honest, I only have one power in mind and it’s anti-Gambit/anti-BB.
Energy Transmutation: At max covers (Passive) At the start of each turn revert up to 3 charged tiles to standard tiles and gain 2 AP of each color tile changed.
As a 4-star he’s weak enough to be dealt with, but he could buy people time while feeding the rest of the team and himself.