When Unkillable Shuts Down...

[Bruno]

Originally Posted by JCurwen3

Or does he stay dead, barring things like resurrection?

Unkillable stops you from dying properly. It doesn't really bring you back from the dead - it puts you in states which prevent you from properly dying (invulnerable skeleton or analogue, incorporeal spirit, etc).

If someone bypassess that and kills you, your Unkillable can't come back on and retroactively stop you from dying - you're already dead!

You want a hindrance, not a power source, if you want them to "come back" after someone turns the power back on.