Lesser Preservation of Self (3), automatic (+1), self only (-3), limited use (-2), uncommon (+1), 1 CP total
A Power who is "Immune" is immune to all non-miraculous injury. They could survive atmospheric re-entry and shrug off a nuke. They never get sick and they can't be wounded by any normal weapon or event, but any Power at all could swat them aside like a mortal with the weakest of miracles.
The Immune Power also has unlimited lifespan but not eternal youth, and will eventually be perpetually stuck in old age.