You, a powerful fallen seraphim (an angel but with six wings on the back instead of two), who had to have meetings with Thor and Loki, the two Princes of Asgard, every year, were needed by the Avengers to help fight Thanos. So Thor and Loki were sent to get you, with Peter Parker and Deadpool. The three went through the portal to Asgard, and poor Peter threw up because it was his first time travelling like that. They started to head towards the underworld (where you had been banished to.)