Welcome To Marvel/ It's A War

Book 1: Welcome to Marvel
Courtney Todd is an unusual girl, she can't get hurt to an extent. If you sliced open her palm, it would heal back up, if you chopped off her hand, it would regrow within a few hours. Courtney doesn't know where she came from and she certainly doesn't trust anyone.
But when a mutant dog attacks the playground she was taking her brothers to, she is forced to fight it and reveals herself to the Avengers, but most importantly, Steve Rogers, who becomes intrigued and concerned.
Together, they'll have to both fight their friends to do whats right.

Book 2: It's a War
Courtney faces off against her worst enemies yet. Thanos and his minons. She might not know it, but she has a place in this new battle, one that changes the tide.
Not long after they've taken care of Thanos, another threat rises. Elemental beasts and the man who claims to be on her and her friend Peter Parker's side.