and rejected him completely. Partly as an expression of adolescent rebellion, partly under the influence of a mutant drug called Kick, and partly out of a desire to impress Sophie, Quire incited a student riot at the Xavier Institute for Higher Learning. Sophie died stopping Quire, overexerting herself after using the same drug to boost her powers. The Stepford Cuckoos held Frost to be partially responsible for Sophie's death - with Frost having "inspired her to heroism" - and disassociated themselves from her at that time. With the death of Sophie, the Five-in-One became the Four-in-One. Wary of having a part of themselves missing, they tested to see if their powers still functioned well by contacting Jean Grey telepathically and informing her that Emma Frost was attempting to conduct an affair with her husband, Scott Summers. Secretly, Esme Cuckoo had been collaborating with X-Man Xorn, then disguised as Magneto. Taking control of the Cuckoos' group mind, she telepathically forced Angel Salvadore to attack Emma Frost, completely shattering her diamond body into fragments. Jean Grey managed to telekinetically reassemble Frost and return her to life, whereupon Emma revealed Esme's involvement in the attack. Esme then abandoned her sisters to join Magneto's new Brotherhood of Mutants. Later, losing faith in Xorn, the Brotherhood turned on him and Esme, who attacked him, angry that Xorn did not return her affections. Xorn then killed Esme, and she died in Emma's arms, stating with her dying breath that she never wanted to end up like Emma. Corsairs Soon afterwards, the institute is rebuilt, with Emma Frost and Cyclops as headmasters and leaders of the X-Men. Frost and Summers divided the older students into several six-person training squads, each taught by a staff member. The remaining three Cuckoos, now calling themselves the "Three-in-One," were assigned to the Corsairs squad, advised by Cyclops. The three girls were the co-leaders of the squad. In X-Men: Phoenix Endsong (March–June 2005), the cosmic entity known as the Phoenix Force came back to Earth seeking to inhabit the body of Jean Grey. Quentin Quire, still in love with Sophie, sensed the Phoenix and exhumed Sophie's body. He sought the Phoenix, which resurrected Sophie, but she promptly chooses to die again rather than be with him. The X-Men defeat the Phoenix, though a shard of it in firefly form locates Celeste. Weapon Plus and Phoenix—Warsong In New X-Men, vol. 1 #154 (May