Derren

Heroic
Only good, or at least unaligned adventurers are supported and no monster you can fight is good aligned.

Super-
The PCs become masters in any skill automatically and it is impossible for them to be bad at a mundane task

Mutants
Compared to NPCs of the same strength, PCs poses a ungodly amount of HP and can withstand huge mountains of punishment. That or they can spontaneously regenerate wounds.

From Outer Space
Yet despite no matter how powerful the PCs become, they can never do anything special what the "natives" (=NPCs) can do like animating a skeleton.