Since the recent update, the Jelly King no longer turns red when going into tantrum mode, which makes it hard to tell if he's invincible or not.
There is already a topic for this actually, just me confirming. But here it is if you want to confirm it also.
http://forums.spiralknights.com/en/node/8602
There is already a topic for this actually, just me confirming. But here it is if you want to confirm it also.
http://forums.spiralknights.com/en/node/8602