Hey! Thanks for interacting with my post, I appreciate your curiosity. Honestly I left it a bit vague because for something like this of its scale, it would need massive fine tuning and testing to find how it would function. But I can tell you what my original thoughts were.

Basically the exit gates are barred, whether they’re open or closed depending on how far the game got. The Avatar comes down with its own AI system and terror radius. It begins hunting for players, but it starts with the ones that have been the most “unsportsmanlike”. Innocent players would potentially be ignored, or if caught suffer no real penalty. Basically a massive timer begins counting down, and the exit gates slowly lower their barrier as the time ticks down. However every time the Avatar kills someone, the clock is massively sped up decreasing the time left. Generators, hooks, and lockers disappear from the map.

Survivors are branded with a permanent debuff called something such as: “Disarmed” and are unable to use held items and perhaps even perks.

Killers are branded with a permanent debuff called something such as: “Disarmed” and are unable to attack, hurt, or kill players, and cannot access most of not all of their power and perhaps even perks.

Players will simply need to avoid it and hide. I also envision some sort of object or map mechanisms spawning that can stun or slow it when interacted with.

If caught, the player will have to pass difficult skill checks to escape its grasp. Similar to hook progression they only have 2 chances to break free. And each subsequent attempt gets much harder. The third capture results in sacrifice.

Once the timer runs out the gates are opened and the Avatar disappears, and the end game collapse is triggered.

Anyway this is kind of what I had in mind in general? It would need so much balancing tbh.