Huitzilopochtli

Huitzilopochtli is a giant white sphere of tight ribbing, built to a boss scale: 2500 health, heavy enough to shrug off knockback, and a Hate value of 2009 - among the highest of any vermin. It floats in place and never chases.

Its one attack is a beam. Every 4 seconds it sweeps a thick lance of lightning and energy toward the player, reaching about 128 blocks, opening with a slow flare and trailing off over a couple of seconds. Below half health it shifts from a defensive stance to an offensive one. Standing in the beam is the danger; the sphere does nothing else.

Huitzilopochtli does not spawn in the world during ordinary play. The only way to summon it is the internal huitzilopochtli capsule, so most players will only see it in creative or debug worlds.

It is named after the Dungeon Alma, which lists Agate as its only spawn, but the place is empty. There are no mobs there at all - just bare dungeon corridors built from plaster block walls, with the occasional white lamp. The flat wallpaper-like blocks make it feel like an unfinished backrooms-style area. There is also no normal way to reach Dungeon Alma, and nothing in the game's scripts places Huitzilopochtli there, so its connection to the dimension currently lives only in the game's assets and likely its native engine code.