Many monsters are unable to directly inflict damage！！！！

I've been playing the Abyss mode these past two days, and there's often a snake-like creature called Eel. You can't deal any damage to it unless it approaches you and performs a handstand tail-whipping move.
Do you know how disgusting it would be if it had an abyssal affix added.
As far as I know, there is also a bug with a tail that can breathe fire, and it has related issues as well.
The boss in Titan Grotto in Chapter 2 can only be damaged after it has made multiple attack moves.