Warhammer: I am the Strongest Regent!

[Time travel + System + Invincible protagonist + Warhammer reference + Father-son daily life + Invincible young hero]

I woke up to find myself the most miserable Primarch in the Warhammer universe, Guilliman!

At the start, the Eldar stabbed him in the neck with a knife, the Chaos Legion attacked him head-on, and his own offspring clung to a broken holy book from ten thousand years ago.

Luckily, I have the "Strongest Regent System" with me, and I merged with Regent Witrum at the start! I stopped the Thunderhawk with my bare hands, traversed warp space with my bare body, and crushed a Chaos Can with a single punch!

Abaddon: "How could he possibly be resurrected?!"

Tzeentch the Demon: "He dragged me out of warp with his bare hands!!"

Ultramariner: "Father...why are you taking out your belt?!"

Guilliman grinned: "Good boy, today Daddy will teach you what 'fatherly love is as solid as a mountain' really means!"

With all the Ultra Warriors upgraded and empowered by intelligent atoms, their offspring are all little superhumans!

The Khorne's army? Crushed! The filthy tide of corruption? Purified!

A treacherous scheme? I'll drag the real me out of the warp with my bare hands and slap him across the face!

Slaanesh is below, the Regent is above!

Guilliman shattered the Eye of Fear, grabbed the heads of the four evil gods, and threw them onto the Golden Throne: "Father, you didn't beat them hard enough or fast enough back then! This generation of Chaos—needs to be whipped with a belt!"