Reborn as a Tiger, Swallowing Flesh and Blood to Evolve Infinitely

[Upgrade + decisive killing + spiritual energy recovery + plunder + natural disasters] (The protagonist can fight better, but can't fight and just run away. The main character will not suffer losses. Everything is focused on improving strength.) (The protagonist is not the Virgin.) The spiritual energy revives, the world of monsters descends, natural disasters occur one after another, the world changes drastically, the world of monsters merges with the world, and the world expands infinitely. I was reborn as a tiger and was defeated by a wild boar at the beginning. So I killed it. Unexpectedly, my system awakened. It's the [Infinite Evolution System of Devouring Flesh] Well, the name is quite long. As the name suggests, I can evolve. As for my motivation to evolve. It's below. An adopted son who was picked up by his parents and adopted. When he reached adulthood, he actually mutilated his parents, killed his compatriots, devoured his family property, fled from the human race, and took refuge with the demon race, causing a catastrophe for the human race in the world, hunting down the genius of the human race, and further destroying the hope of the human race. I marched all the way, just for revenge. Who would have thought that when I became emperor, I would break into the restricted area and finally find the traitor. Phew! But who knows, just when the traitor is about to be killed. Demons who transcended the imperial realm, oppressed the void, came to the world, and annihilated all life with just one glance. The traitor stepped on his chest and looked at me with a mocking look on his face. "Brother, who let you block my way? You deserve what you get today." The body was annihilated and completely dissipated into the void. Just like this, the damn beast dared to taunt me before he died. I will not kill him in this life! (Blue veins popping out) I swear I will not be a human being!!!