The mysterious apocalypse is coming, luckily I have a simulator

Seven days later, the doomsday comes. Fortunately, you have a simulator...

[The doomsday simulation has begun]

[Please choose one of the following three talents: 'Devil's Contract (Gold)', 'Resurrection of the Dead (Gold)', 'Mirror World'...]

[...]

[On the first day, the sun no longer rises, and the doomsday arrives as expected...]

[On the second day, the temperature drops sharply, and citizens scramble for supplies...]

[On the third day, safe houses are harmful to health, so staying there less is the best way... You are crazy, leave your safe house, and look for mystery]

[...]

[On the forty-fifth day, there is no difference between reality and dreams, you encounter a strong enemy... You die]

[This simulation has ended]

[Please choose one of the following three rewards: 'Devil's Contract'...]

If you use the simulator properly, you can get a powerful doomsday reward every day before the doomsday.

So, when the countdown to the doomsday ends, you are already ridiculously strong...

...

(Shuangwen + Cthulhu elements)