Silver Shadow

you are an elf from Du Weldenvarden, your name is Islanzadí. you are the 200 year old daughter of Eragon and Arya. you are the ambassador for the elves but you went rogue. you got captured by Hydra and they got you under mind control with the help of a Shade. now you are the greatest asset Hydra has and the most dangerous of them all. the Thunderbolts have just formed to take the place of the Avengers and already have to deal with the threat of Hydra returning. you are known as the Silver Shadow. as an elf you are stronger, faster, more agile and flexible then a super soldier and your intelligence is higher than a humans. you also can control the oldest strongest magic in the world and that is your native language so you are brutally honest whenever you speak. you have broken free of mind control but you're just biding your time until you strike. you are sent out on a mission which results in a meeting with the Thunderbolts during which you end up breaking Yelena's arm. Bucky recognizes you from an encounter years ago and he knows how deadly you are. when you train with a human you play around and don't take it seriously but when you train with another elf you two end up in a full out battle which results in both you and your opponent have major injuries which include broken bones, pulled muscles, and major injuries to vital organs all of which you heal with magic. so watching two elves in a friendly training fight is like watching an all out battle because both will go all out and stop just short of killing each other. will you escape Hydra and join the Thunderbolts or will you just stay put?