Transmigrating into Ultraman: Starting in the Land of Seals

(Ultraman + no System + not invincible + alternate world setting + characters stay intelligent)

A century after the cataclysm, magical beasts have torn civilization apart.

The Supernatural Administration: humanity's last line of defense.

Ye Lan awakens.

Outside the empty hospital room lies an unfamiliar wasteland era.

Yet his mind is filled with fragments of memories from another “peaceful Earth.”

Giants of Light descend, and monsters rip open the night.

Forbidden zones lie shrouded in deathly silence, while shadows roam the ruins.

The Supernatural Administration's files contain no mention of “Ultraman,” only “unidentified giant life-forms.”

But familiar silhouettes and names surge through Ye Lan's memories.

Five missing years, a giant who appeared out of nowhere, and monsters warped beyond recognition.

To piece together his past and uncover the world's festering wounds, Ye Lan ventures into the forbidden zone where light and shadow intertwine.

(Slow to warm up; the pacing drags a little before Chapter 40)