User blog comment:Pridecat4/Shinji and Hisagi Bankai/@comment-29325824-20181203150255/@comment-29325824-20181203152347

One of them seems to have been removed by now. But I can summarize:

Shinji: either reverse only time, or reverse pretty much anything, even concepts such as friend and foe.

Hisage: either empower him the more damage he gets (close to death = one hit kill), or share all the damage between his and his opponent while preventing either from actually dying from them (battle of stamina).