The Monk ability Chi Torpedo used to deal damage (Windwalker) or heal (Mistweaver) targets it’d pass through.
Why is that no longer the case?
This was removed in Legion - the same expansion where Fel Rush was introcued: a spell that deals damage to targets it passes through.
Think that was cause monks were manipulating the distance of chi torpedo by jumping during the cast locking them in place, and to my knowledge it might of even done more damage back then than RSK did