Age of Mecha: Divine-grade Genetic Extraction - Chapter 20

A skilled but unfortunate modern-day assassin was killed in a freak accident. However, he soon found himself summoned to another world by an evil wizard, who had him possess the body of a boy as an experiment. After successfully planning the evil wizard’s downfall, he used the wizard’s body as a springboard to gain influence and power in his new world.

- Description from Novelupdates

One day, I was summoned to this world.

Gou Liang travels through worlds in order to complete a mysterious and arduous mission…

16 worlds in total:

School Campus: Strawberry Flavored Scholar Gong √
Entertainment circle: Lemon Flavored Film Emperor Gong √
Ancient Time: Honey Tangerine Flavored Shadow Guard Gong √
WuXia: Melon Flavored Senior Brother √
Beastmen: Pineapple flavored Beastmen Gong √
Ghost Spirits: Snow Pear Flavored Dead Gong √
Ancient Time: Gr*pe Flavored Regent Gong √
Apocalypse: Banana Flavored Boss Gong √
Interstellar: Pomegranate Flavored Sentinel Gong √
Modern: Citrus Flavored Aristocrat Gong √
Mecha: Sweet Jujube flavored Lunar New Year Gong √
Ancient Time: Durian Flavored Battle God Gong √
Magic: Watermelon Flavored Blacken Gong √
Cultivation: Cherry Flavored Disciple Gong √
Fantasy: Blueberry Flavored Demon King Gong √
Celestial World: Bayberry flavored Senior Immortal Gong √

- Description from Novelupdates

What is a Protagonist?

After transmigrating, the wind will blow and the water will rise! After rebirth, begin the slaughter in all four directions!

Bring a system to win at life!  Carry a dimension to soar above the masses!

Enter a red packet group and walk to the peak!

… …

How could a life without a cheat be called a Protagonist?

However——

Behind every successful Protagonist lies innumerable cannon fodder, they are unresigned to be the Protagonist’s stepping stone, they want to be the main characters of their own lives, it doesn’t have to be dazzling but it must be a unique and unmatched life.

Wen Qing’s job is to complete the wishes of these cannon fodder, settle their obsessions, and allow them to successfully reincarnate.  Regarding the reward for completing the missions ——she can snatch the Protagonist’s golden finger.

- Description from Novelupdates