Doomsday: My Class Refreshes Every Week

[Doomsday + no saintly do-gooder + ruthless and decisive + nearly invincible power fantasy, but not brainless + starts at school]

Gu Qiu transmigrates and activates the Doomsday Rescue System from the start.

He discovers that each week he can acquire a new identity and profession, while keeping one skill.

In the first week, newly arrived on Blue Star, he gets the swordsman profession.

[Gu Qiu darts through the zombie horde like a gentle breeze, drawing his sword every so often. His blade moves like a swimming dragon, slicing through the zombies' necks and beheading them one by one.]

In the second week, he gets the summoner profession and manages to summon a Vajra Demon Ape. The ape takes out the little zombies with a single punch, then battles a giant zombie leader in a brutal, bone-crunching fight.

He summons a pack of Bloodthirsty Wolves, and his underlings help him kill monsters.

In the third week, he gets the fire mage profession, burning zombie hordes and nests of mutated rats.

Priests, berserkers, mages of every element, rangers, elementalists, archers, hunters, druids, necromancers, dark knights, illusionists, light priests...

As he retains more and more skills, Gu Qiu finds surviving the apocalypse easier and easier.

Until several weeks later, when he gets the cultivator profession...