Genshin Impact: Disguised as an Old Woman, I Become a Harbinger

[System] + [Nearly Invincible] + [Some Full Battlefield Mechanics] + [Genshin Impact × Delta Force] + [A Few Memes Throughout] + [Conspiracy?]

Chen Feng transmigrated to the continent of Teyvat after pulling an all-nighter playing Delta Force and dying suddenly. He also activated a Roleplay System: the more roleplay missions he completes, the stronger he becomes. Freshly transmigrated and forced to take things one step at a time, he somehow ended up as the Fatui's twelfth Harbinger, codenamed Polaris. After becoming a Harbinger, he used the rewards distributed by the System to start doing things that were “impossible to figure out.”

For example:

Building Dam Zero near the border between Liyue and Fontaine.

Setting up a missile base on an island in Inazuma.

Building a space center in the Sumeru Desert.

Constructing the Tower of Babel behind Fontaine City.

His actions left everyone else baffled, but only he knew that all these thunderous measures were for the sake of… (system crash)

The skies belong to Haavk!

“Friendly reminder”

The author's explanations in parentheses do not count toward the story's total word count.