In the MCU/Marvel with the Omnitrix/Ultimatrix - Chapter 60: The Terror Of Facing A Conquerer

Blessed with unlimited mana, Noah travels the worlds and sees rampant corruption and injustice.

Reborn into a magical world after a life of misery, Kael gains a unique power... The ability to steal the souls of those he kills and, more intriguingly, collect the souls of the most beautiful and sensual women in the world.On his hunting journey, he transforms his body from weak to unbeatable, while building a harem of stunning souls.________________Additional tags: Fantasy - Adventure - Action - Romance - Harem - R18 - No NTR - No Yuri - Weak to Strong - Bloodlines - Evolution

The doomsday fell upon the earth when a dragon coffin sealed under a snow mountain for ages shifted, and the civilization of gods and devils began. The whole universe turned into a fantastic new world where everyone could rise to the top through cultivation. A lucky young boy seized the opportunity, and started his journey to be an overlord in cultivation.

- Description from Novelupdates

Meet Sora and Shiro, a brother and sister who are loser shut-ins by normal standards. But these siblings don’t play by the rules of the “crappy game” that is average society. In the world of gaming, this genius pair reigns supreme, their invincible avatar so famous that it’s the stuff of urban legend. So when a young boy calling himself God summons the siblings to a fantastic alternate world where war is forbidden and all conflicts–even those involving national borders–are decided by the outcome of games, Sora and Shiro have pretty much hit the jackpot. But they soon learn that in this world, humanity, cornered and outnumbered by other species, survives within the confines of one city. Will Sora and Shiro, two failures at life, turn out to be the saviors of mankind? Let the games begin…