Hardest single hit action? (non-dot)

[Raiden_Ki]

Can Foul actually be in the running? I mean he said :Single Hit Action". I know he didn't say Single Target, but almost every move is single hit, even AoEs. I guess a better way to ask his question is what is the Highest Potency Action or Hardest Hitting Action.

True but foul can be used on one target as well so that's why I took that one into consideration as well. Kaiden Setsugekka it is then.