"Syndicate" is the name of two mutants, psi-resistant conjoined twins named Luke and Matthew. They try to rob a bank to help their terminally ill sister, but are stopped by Professor X. Realizing their plight, he gives them a chance to redeem themselves by working as his private agents. Created by Brian K. Vaughan and Steve Dillon, they first appeared in "Ultimate X-Men" #58. The characters have an unusual heart which pumps out electromagnetic pulses with each beat; this disables almost any electrical system. Their interlinked brain matter also makes them immune to telepathic control, although they are still susceptible to mind readings.