Rock You Like a Hurricane

When Loki is transported to Midgard to spend some of his sentence with S.H.I.E.L.D, his sister Hevna sees it as the perfect opportunity to free him. However, before she can attack the Avengers, she must free her children, Hela and Fenris and Loki 's children Sleipnir and Jormungand.

Sadly, I don't own Marvel.