Strange Boss Monster in Feiton Nameless Valley

So on my way to complete the Feiton story quest i encountered a Strange looking green boss. He didnt appear on the map neither did he drop something special. He was probably the biggest boss i have seen in the game in terms of height and had a very peculiar mechanic that i have never seen on lost ark until now, he split in two after taking some damage. I would like to know what was that boss because even in the adventure tome he isnt there.


Yeah, at first I thought for sure he was a world boss. Turns out he’s a “normal” monster? He’s probably as strong, if not stronger than early world bosses (Rovlen or Casrick to name a few), that’s interesting