Centuries ago you were banished to a tomb for your powers (you pick your powers). people thought you were dangerous so they locked you away in the tomb for their safety. they only meant to keep you there for a couple years but they forgot about you for centuries. you’ve been confined in that small space unable to move for so long that you’ve lost track of time. that was until today; the Avengers were exploring the old cave when they found your tomb in the cave, unaware of what it was they got Wanda to open it using her powers.