Uncanny X-Men #15

Psylocke and Magneto don't see eye to eye. Whereas Magneto is willing to do anything it takes to ensure the future of mutantkind, Psylocke believes there are some lines that shouldn't be crossed. And when she stands in Magneto's way, he may just decide that in the quest to safeguard his race, Psylocke is an acceptable sacrifice to make! Rated T+