La Ultima Luz: r/place with an enemy (free browser game, no account)

r/place worked because of the clock: it only existed for a few days. This is the other answer: a canvas that never dies because something is always trying to kill it. A real LLM erases pixels, must declare each siege first, and can be asked for mercy through an in-game embassy. Eras end when the central flame falls, and everything standing goes into a permanent archive.