As a result, the Hellfire Club believed that it would be in their best interests to summon the Phoenix and merge it with Jean Grey via a ritual. With Jean acting as the Phoenix Force's human avatar, she would be worshipped in a greater world. While the ritual was successful, the Phoenix had different plans and promptly slew the Hellfire Club. In the "Ultimate X-Men": Hellfire and Brimstone arc, the Phoenix Force makes its first appearance as the entity/personality within Jean's body.