Oh, I see! My roommate also confuses the made-up name "Mephitto" (based on "mephit", as in "skunks") for "Mephisto" quite often! His point of reference is Diablo, though, not Spider-Man.
Thanks for clarifying, though! He does definitely look quite devilish here...
Link
Unownace
"Hello Spiderman, would you like to trade your marriage with Marry Jane?"