Marvel: This Little Watch Scares Black Widow from the Start

[Marvel] [Ben 10] [Multiverse Crossover] [Invincible] [Multiple Heroines] [The Avengers' Big Brother] After transmigrating into Marvel during the Battle of New York, Lin En activates a god-tier Omnitrix System from the start. Transforming into Four Arms, he rips a giant dragon apart with his bare hands and beats Loki to a pulp, becoming the "most dependable alien big brother" in the eyes of the Avengers. He thinks his days will now be an invincible slice of life: having drinks with Tony, teaching Spider-Man, and roaming the universe with Black Widow and Wanda. Then one day, S.H.I.E.L.D. issues its highest-level alert: dangerous people with transformation watches have appeared all over the world, and even in parallel universes! Captain America from Hydra is wearing an [Albedo-style Ultimatrix]? A transmigrator from another world is rampaging through Hell's Kitchen, wielding a [Nemetrix] to hunt mutants everywhere? And a dark version of [Tyrant Ben 10] has even come charging in from the multiverse?! When watch-wielders from various universes, Thanos, and Vilgax gather on Earth to claim the throne of "Ultimate Evolutionary," Lin En just smiles. [Alien X] descends! With a single finger, he crushes every ambition. Tony Stark: "The luckiest thing in the world is that Lin En is on our side. He's my dearest friend!" Spider-Man: "Big Brother Lin En is the coolest superhero I've ever met. No contest!" Natasha, Wanda, and Gwen: "What do they know? Lin En's greatest talent isn't on the battlefield..."