Fuck it, I'm gonna infodump about Reptil cause he's highly underrated and kinda obscure (based on the large amount of people I've met not knowing about him) and he's one of my top favorite Marvel superheroes!
Reptil, aka Humberto Lopez, first appeared in a one-shot comic titled Avengers: The Initiative: Featuring Reptil; but I was introduced to him watching The Super Hero Squad Show as a kid.
He has a crystalized amulet that grants him the ability to transform into many dinosaurs; and pterosaurs on occasion. It also allows him to sense any reptile. Note that it is not the source of his powers, but only the catalyst for them.
In Super Hero Squad they unfortunately introduced him with most of the cast making fun of him for being the youngest member and a kid, which I really did not like upon rewatching. They eventually stopped doing that in later episodes and mainly had him team up with Wolverine, which I thought was cool as a kid!
I wish more people knew about him cause he's been in comics since 2009 and has had comic issues as recent as 2021! He's been around for almost a decade, and I highly recommend reading more about him.
He's one of my all time favorites because prehistoric creatures, mainly Mesozoic reptiles, are one of my special interests! I will latch onto anything involving dinosaurs and other prehistoric reptiles.