I am experiencing two issues with the Doomsday Krok Gauntlet:
1: If you flee the battle against the Time Butterfly and return to the dungeon through Dungeon Recall, the blockage that is in place before you defeat Krokhotep is back up. In addition, you are pulled into Krokhotep's empty dual circle and trapped, forcing you to exit the game.
2: If the Time Butterfly and her minions are defeated at the same time (through an AoE attack) the Time butterfly will heal all of them, instead of just itself. Then it won't summon more minions to progress the fight, since the ones it had before are still there. This impedes the fight for anyone relying on AoE attacks.
Your first issue is a bug if true, but in my experience, the second one is supposed to happen. You MUST defeat the minions before defeating the Time Butterfly or it will respawn. That is the cheat that is possesses and is NOT a bug.
