American Comics: Starting from the Invincible Young Hero

Russell transmigrates to the world of Invincible Young Heroes and becomes the cousin of the protagonist, Invincible Young Hero Mark Grayson.
It's a pity he's my cousin, not my other cousin.
Otherwise, he would also be a member of the Vitrum, the strongest race in the universe.
Russell's innate advantage didn't come into play, but fortunately, he gained a small boost later on. He acquired the Conquest System, which allows him to obtain the template of the opponent's full-power abilities as long as he defeats them.
"Leveling up step by step to gain the power to compete with the Vitrum people is too slow. Is there a way to become the strongest on Earth the day after being an ordinary person?"
Yes, yes.
Russell unexpectedly discovered a loophole in the system—corpses, since anyone can defeat a corpse.
Coincidentally, his uncle, All-Around, discovered his son's awakened abilities and, following the plot, ambushed and eliminated the Global Guardians the next day.
Russell could only reluctantly (suppressing a smile) accept all the superhero abilities of the bootleg Justice League's Global Guardians.
Mark Grayson, an unknown figure, has waited seventeen years to finally awaken his Witrum abilities and is ready to debut as the "Invincible Young Man," becoming the coolest superhero.
The next day, she discovered that her cousin, who had always been better than her since childhood, had also awakened superpowers and become the strongest superhero on Earth, and she was completely helpless against him.
No, is that right?
Russell waved his hand: "The Invincible Young Hero only needs to take the beating, while I, the strongest Earthling, have many more things to consider."
World travel (to be determined), Invincible Young Hero, The Boys, Superman and Lois, DC Comics Universe...

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