Nexus-Prime, the Verdict Warden

The automated final guardian of the Precursor Inner Sanctum — a self-repairing war-construct the size of a battle station that has held its post for forty thousand years. Nexus-Prime does not tire, does not retreat, and adapts to whatever defeated it last week. It is the gateway boss of the mythic tier: until an alliance can put Nexus-Prime down, the deeper endgame stays sealed.