Warning: Contains spoilers for X-Men #12
One of the X-Men's most powerful members, Jean Grey, has officially lost all reason to be part of the team. After her latest battle, Jean was able to accomplish the seemingly impossible goal that motivated her to stay in the X-Men, meaning that she is now free to move on.
As Marvel Girl, Jean Grey is one of the founding members of the X-Men. The initially shy young girl grew to be one of the most reliable members of the team throughout its many incarnations, and a powerful mutant on her own, until the day when the Phoenix Force chose Jean as its host and her life changed completely. The Phoenix is a primordial force of cosmic destruction that consumes entire planets and star systems, representing the cycle of death and renewal. The Phoenix used Jean to take form and destroyed planet D'bari IV, killing its five billion inhabitants. Despite the fact that Phoenix put her in stasis while going on a rampage, Jean still feels responsible for all the death caused by the cosmic force, perhaps due to the intricate relationship that ties them. During the Hellfire Gala, when she was elected as a member of the new X-Men team, Jean said that she wanted to be with the team until she saved as many lives as the Phoenix claimed. That claim may seem preposterous at the time, but Jean managed to accomplish it.
Related: The Weird Ending of X-Men's Dark Phoenix Saga Insulted Jean Grey's Memory
In X-Men #12, by Gerry Duggan, Pepe Larraz, and Marte Gracia, Jean, together with Wolverine, Polaris, and Rogue, assaults Gameworld, the space casino run by Mojo's disgusting replacement, the sentient fungus Cordyceps Jones. Gameworld started running bets on who or what could destroy the Earth, which happened as
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