X-Men (1992) - Season 3, Episode 42
When the X-Men confront Phoenix and ask it to give up Jean's body, Phoenix vows to destroy the team. To re-energize, she flies up through the D'Bari Star System, passing a very surprised Shi'ar Star Cruiser crew. As they watch in horror, she feeds upon and destroys an entire star system. To defend space life as they know it, the Shi'ar empress Lilandra decrees that Phoenix/Jean Grey must die.