Prehistoric Era Simulator: I Am the Nine-Colored Yuan Deer

A nine-colored primordial deer! And the leader of the deer clan, the first deer in the Primordial World. Things seem pretty good from the start.

What? It's the Calamity of Ferocious Beasts, and the wolf clan is already eyeing us from outside.

Ding! Simulator loaded. Would you like to begin a life simulation?

[Simulation started:

…]

This is the story of a deer who, with the help of a simulator, roams freely through the Primordial World and rules over all the heavens.