Remy wandered the world as he plied his skills as a master thief, aided by his mutant power to charge objects with explosive energy. He employed playing cards he charged with kinetic energy as his trademark weapon. At one point Remy had approached the master geneticist Mr. Sinister for help in controlling his powers. Sinister removed some of Remy's brain tissue to reduce his power levels, thus affording him a greater degree of control. As a result, Remy was now in the geneticist's debt, and Sinister subsequently charged the thief with assembling the team of assassins called the Marauders. Remy did not realize that Sinister would employ the Marauders to massacre the underground mutant community known as the Morlocks. Seeing the horrific results of his actions, Remy attempted to stop the massacre but was almost killed by the Marauder named Sabretooth. However, he did manage to save one young Morlock girl who would one day grow up to become the X-Man named Marrow.