He Starts by Signing in to Arkham, Then Abducts Harley Quinn

Transmigrating into a world fused with American comics, Link begins at the talent-rich Arkham Asylum. Activating a god-level sign-in system, Link, gazing at the captivatingly eccentric Harley Quinn before him, makes a bold decision. Sign in with the Joker, gain the power of chaos; sign in with Batman, gain the power of money and fighting skills; sign in with Superman, gain the body of steel! When Thanos's fleet descends upon Earth, Link, now the strongest behind the scenes, with Harley Quinn on his left arm and the Infinity Gauntlet in his right, smiles and asks: Who is the true ruler of this universe?