..you know that green Ghost, Revenant?

They have Drain Touch...

Something weird happened involving that attack, the Revenant went next to a another ghost that was Critical HP, it healed it with Drain Touch (drain is reversed on undead), but it's funny to see the target actually COUNTER the healing from Drain Touch.

Like this...

Revenant teleports next to injured ghost
Uses Drain Touch
Ghost is healed Revenant loses HP
Ghost COUNTERATTACKS!

It's just that it's counterable... but it's like "Hey thanks, now GO AWAY!"