Counterattack System appeared when I'm already At The Mahayana Realm - Chapter 524.1 - 525:

“Devouring Lifespan to grow stronger!!”When Ricky Stormwind—a washed-up office worker—drank himself to death, he expected eternal nothingness. Instead, he awoke in a new world… as a mosquito.Weak as an ant. Fragile as a piece of paper. Prey to everything.But this world is no ordinary one. Magic, monsters, and powerful beings dominate the land, with ruthless forces waging war for supremacy. And Ricky? He possesses a terrifying ability—he can drain lifespan from any living creature and use it to evolve.A single bite can grant him hours. A feast?..... Years!!Now, in a forest filled with predators and beside a village on the brink of destruction, Ricky must climb the evolutionary ladder—from insignificant pest to a calamity that could devour the world itself.But when his first real meal triggers a mass sacrifice, the world mistakes him for a rising Demon Lord. Bounties are placed on his head. Armies march to hunt him down. And lurking in the shadows, a forbidden power calls to him, promising a path beyond mere survival—one that could reshape reality itself.In a world where everything is prey to something greater, something horrendous… he will rise to become the apex.

As long as hamster spirit Shu Shu can survive the lightning tribulation, then his cultivation will be able to turn him into a human. In the end, the lightning tribulation strikes him and he arrives in the… future?

Touching the hamster’s ear on his head, in order not to be seen by people and taken to be a monster, Shu Shu decides to dig a hole in the forest to hide and live, and as a result… a very big snake aaaahhhh! Please, don’t eat me!

The crown prince of the beast empire is seriously injured and becomes a beast that could no longer change into human form. He lives alone in the forest. One day, he sees a cute sub beastman deep in the forest. The sub beastman also sees him. At once, the sub beastman’s eyes roll backwards and he faints…. Scared to death?

Shu Shu: I have a unique technique of faking death.

- Description from Novelupdates

Betrayed by her entire family, Tang Yue, the seventh princess of the snake clan, was betrothed to the tyrannical Elven prince, who is known for his blood lust and cold-blooded murders.He is even rumored to have killed several concubines mercilessly.Deemed as a piece of useless baggage and now tossed aside as a political chip, Tang Yue braved herself for the new torturous life that awaited her.As if this was not enough, someone mysteriously poisoned her in the betrothal ceremony.But akin to a slap in the face, that poison actually turned around Tang Yue’s pathetic life!!Poisonous fruits? Sure give me some. I need to snack anyways.Deadly toxin? Sure. My throat is a bit parched.Heh. Now you want to actually cut me down? Sure. You just have to slash past this thick skin!The lowly beast that had invoked its innate ability to evolve silently resolved to conquer the heavens. And of course, she had a master... ahem... system to help her along the way!

Two heroes of the game Legend of Heroes 2 who were rotten waters*.