Regeneration

I always kind of wanted a really cool power that you could show off if need be. You know if I was to have special super powers. Something like being a fire starter or something. Then I was playing this game and the hardest freaking character to kill was the one with regeneration. They couldn't do anything special they could just heal themselves. I started thinking off the different characters who heal.
Wolverine - The Xman who didn't' do anything really cool until he was taken as a subject and given the antimantium (probably spelling this wrong) claws and skeleton.
Priests - In just about any game you play priests are easy to hurt but they can heal themselves and that can make all the difference.
Trolls - They have a regenerative power that just kicks butt. Try killing one of those.
A lot of magic cards - regeneration was always a good power to have cause as long as you had a bit of spell casting ability set aside the opponent couldn't just take you out.
Think about it a bit. All those ills you have you could just fix.