Complex sentence: While at the Kravinoff estate, Alyosha was learning about his father from Spider-Man when Calypso returned with Kraven's tribesmen; she set the home ablaze and killed all but one animal, Gulyadkin the lion.
Split into simpler sentences: While at the Kravinoff estate, Alyosha was learning about his father from Spider-Man when Calypso returned with Kraven's tribesmen. She set the home ablaze and killed all but Gulyadkin the lion.