serpent abyss monster is really fun!

Serpent mob runs quick up to you... or better yet picture being teleported to it because head hunter belt is a thing... it starts spinning and is invulnerable. yet, it is still able to do damage to you... who thought this would be a fun and engaging thing to add to this game. Or, is it just a buggy shotty coded enemy that the game is trying to pass off as an intended feature (looking at you abyss mobs dropping omen of liege in clouds).