Written by PETER DAVID Penciled by VALENTINE DE LANDRO Cover by DAVID YARDIN It's Siryn in the fight of her life against the absolute last person that she would have expected to be battling. And Madrox, Layla and Ruby find themselves under assault by the Sentinels just when they're on the verge of discovering the mystery behind Cortex! Collecting X-FACTOR #46-50. 128 PGS./Rated T+