(W) Frank Tieri (A) Scott Kolins. Written by Frank Tieri Pencils & Cover by MICHAEL RYAN "CHEST PAINS" Parts 1 (of 1)! New Excalibur is alerted to a depowered mutant that has recently been returned home to England...Chamber! Learn the secret history of Chamber* but will the team be able to find out the truth before Chamber is killed?!