This power is similar to reconstitute self but with the limitation that it is not automatic. This would be a great power for a cyborg or a robot to have. It could also work well for a supernatural being.
The way that it works is, if at any point in play your character is reduced to 0 red stones of health you are for all intents and purposes dead until/unless someone else comes along to rebuild you/call you back from the dead/provides the mystic ingredient that will restore you to life etc... While a GM can reconstitute anyone she wants any time she wants this power makes it expected once the conditions have been met. If those conditions are never met then you stay dead.
I'm thinking that the cost should be around 5 stones. Feel free to make suggestions and comments. I admit that this is not the most revolutionary house rule ever but I thought it adds a flavor to the game that was worth the time to write this up.
While it does add flavor, I'm not sure that it's really needed (at least at 5w). Really, what this is saying is that you can do what Marvel has done to basically every superhero. Nobody ever expects a superhero to stay dead forever, it's just the way things are done. Not saying that it's a bad Modifier, but it just seems a bit trivial to have, essentially, a CL 6.5(ish... 5 stones lies between CL6 and 7).
Absolutely not needed. If hero needs t ogo back, he/she shouldnt need any prerequisition to do. Being a her/villain pretty much gives it to you for free, not to mention that all important cyborgs/androids are repaired all the time, even if they say its not possible.
edit: Actually, NOT BEING ABLE to come back is a challange worth a lot of stones, like cyborg that doesnt have a possibility to use spare parts.
While Marvel generally tends to bring characters back from the dead, this modifier helps ensure that it happens promptly. Also, for those campaigns/GMs that don't usually allow for the dead being revived, this can provide a way out.
If you want to take it the other way, too, this could be a challenge, in a way. If somebody tries to revive the character in any other fashion than the one chosen at character creation, it fails. Interesting twist, especially if the campaign has a standard method of revivification.
I see extremely nice plothooks that come with this power...
But in anycase, since "normal" reconstitute self costs 8w, so I'd price this around 4, or Gm could give discount if the requiments are "cool"(=hard to achieve, ex. Sprinkle corpse with some dragonblood, on wednesday, while it's raining and you have to sing Shakira's "my hips don't lie" while doing it.)
Personately, I like it, but playah's right on one major thing: robots do not need it. A robot is by definition a machine, and thus can be rebuilt by whoever has the knowledge in technology and the materials required to do so. (And... please don't remind me that robots get such a huge discount on most things anyway and shouldn't get that for free... I make my players pay for everything just as everyone do, even if they are robots, 'cause otherwise it's simply not fair at all. )
Also, I think 4 stones is a good cost, and that 3 would be good with the so-mentioned requirements.
The Joker, wielding the power of Mr. Mxyzptlk as "Emperor Joker", was even able to rewrite logic itself, for example, making the whole world believe that 2 + 2 equals "fish".