Lol you still haven't gotten this mirror game thing down have you?

Again I say, no thing is as it seems...

Dormammu is the entity locked in a time loop because he can't figure out the Anomaly in the equation so he is stuck in a loop.

IT is a computer that is looping on itself because it can't compute the equation. IT is shutting down.

That is all I am allowed to tell you right now. I don't want to spoil the rest of the show.