Complex sentence: Upon arriving in the Tenth Realm, known as Heven home of the Angels, Thor announces he is of Asgard and the son of Odin then he and Young Loki are attacked by the guards of Heven.
Split into simpler sentences: Upon arriving in the Tenth Realm, known as Heven home of the Angels, Thor announces he is of Asgard and the son of Odin. Odin and Young Loki are attacked by the guards of Heven.