Here are a couple of custom heroes I've been experimenting with. They are from the New Mutants comics I remember although like most of the mutants they've probably been on different teams at different times (not sure if they were ever actually on one of the official X-Force teams, but their friends were, and we need more X-Force team members anyway).
Karma Karma is based on redirecting the villains from place-to-place or using them to do the dirty work. She probably can't be the only feature of your deck vs. really high attack masterminds since she actually has no printed attack herself. But I think this works for her abilities.
Magma Magma is modeled off of Colossus in that she gains wounds but also gains some benefit from doing so. This leads up to her rare and a possible eruption.
Would love to hear your comments and thoughts on these.