The Secret Source Automaton: Overseer Device (the Escoffier/Skirk boss) has appeared in four consecutive endgames (Spiral Abyss ×1, Imaginarium Theater ×2, Stygian Onslaught ×1), with no signs of stopping. It will appear in the next Abyss, too.

Is anyone else frustrated by how often this appears? It feels like such a restrictive, overbearing character check, more so than other "You must bring X element to win"-type bosses.