Your ability scores each increase by 2.

Humans reach adulthood in their late teens and live less than a century.

Due to being an upgraded human, your size has doubled, as you also have advantage in strength-based checks and saves, with expertise.

Your base walking speed is 30 feet.

The divine demon has immunity to fall damage, but resistance to bludgeoning damage, all the while once per turn they can build up enough energy to do a devastating blow towards an opponent as many times by their proficiency bonus per day. (Auto Crit)

You can speak, read, and write Common and two extra languages.

Whenever the reinforce human goes down, they can come back to full hp, but this time their in a frenzy-like state attacking the closest being to them.

(Just give them double the hp, and have it where when they drop to 50% or below they enter a blind rage)

You have immunity towards Necrotic and Radiant damage.

As an action this upgraded human can activate their enhancements and become even stronger!

You gain +2 ac, +10 movement speed, +4 to hit, and +10 damage for 1 minute. Afterwards you take 1 level of exhaustion and can use this ability again after a long rest.