Somehow I ended up losing a run for no appreciable reason? Floor 88 of endless mode, I had a set of Mirrored Sculptors & Mirrored Obelisks along with an Adaptive Paladin with several hundred attack and HP. Ended up in a battle against some mostly-regular enemies with a Free Company Palisade at the very end. Near the end of the battle, with my Paladin as the last one standing, turns took excessively long as the game seemed to check every single one of my dead followers before getting to my Paladin's attack, which would deal 1 damage to the Palisade, then likewise the Palisade would deal 1 damage to the Paladin. After turn after turn after turn after turn of this, the Palisade was finally down to 2 HP while my Paladin still had 233 health left. Then the "Excision Failed" message suddenly popped up, ending both the battle and my run. What happened?