Cthulhu

All AnimalBoss

Cthulhu does not belong to any age, any faction, or any rational category of threat. When this entity surfaces on the map, it targets every player's forces without discrimination, and its statistics make it effectively unkillable by any single civilization acting alone. Its melee strikes delete infantry outright; its presence suppresses nearby units through a fear aura that reduces their combat effectiveness. Conventional armor ratings are meaningless — Cthulhu's attacks bypass standard resistance values. The only viable strategy is a coordinated assault from multiple players simultaneously, concentrating the highest-tier ranged units and artillery available while keeping melee forces well clear. Even then, attrition will be heavy. Defeating Cthulhu yields unique rewards, but the encounter is designed to be a civilization-ending event if players fail to cooperate. It appears rarely and without warning — when you see it, drop everything else.