Survival (Horror?) with OP Fandom characters

[behold_the_void]

I had an odd idea for me considering I don't actually like Survival Horror (even more odd in that I probably wouldn't join this game), but I think this out focus more on the "survival" aspect than the horror. Basically, it's a question of how do you keep panfandom characters down when many of them come from frankly stupidly overpowered canons, but still preserve the element of the character's abilities which often is a big part of what they are. This game is also something of a logistical nightmare so I don't think it's realistically viable, but it's a fun idea.

The idea here is building the core engagement around the idea of community and survival. The base setting is a world where a major cataclysm blasted civilization and turned the world into a barren wasteland. Depleted of prana, the force that empowered the world, it is a dying world.

In an effort to restore the flow of prana to the world, the last remaining scientists forge a machine to reverse the polarity of the leaving prana, bringing it back to the world. Unfortunately, it doesn't work quite as intended. The already-damaged eco-system was too fragile and it tore rifts in time and space, bringing the in the players and blasting the area around its activation apart.

Now, mechanics. Characters come in with a certain amount of prana, which is assigned a numeric value by the mods when the character comes in. Characters have access to all their abilities as per canon, however, they need to expend prana in order to do so. The rub is, the characters don't know how MUCH prana it'll cost, the mods tell them when they try to do something (although it should remain reasonably consistent). Additionally, prana will slowly drain away during the game.

The general flow of events is working together as a community to build and survive and find ways to restore prana. Because I don't like depressing going to lose scenarios, the eventual end plot would be finding a way to truly restore the flow of prana, which could then be used to return the characters to their homeworlds.

Prana can be restored in a few ways. Taking the life of another creature will cause its body to evaporate into a burst of prana, which can be collected. The amount depends on how much prana the being had stored and the strength of the being killed. Prana can also be restored in other areas, finding objects or places of importance might have prana that can be drawn out. It can also be expended to try to restore the world, creating some vegetation and growth that might be used to bring more stable prana flow. All of this is done while having to defend the community against raiders and horrific monsters that gorge themselves on prana and have mutated into abominations. Slaying them will bring prana back to the community, or can be siphoned off by a singular entity if they choose.

Basically the purpose of the RP is to build a situation that would normally emphasize the lone selfish jackass badasses but in truth needs to be resolved in a more realistic way - i.e. banding together, surviving, and working together toward a brighter future, and to emphasize the idea that all people have value.

Anyway, as stated it's an interesting idea, I can't see it being enormously viable since it'd require mod input whenever a character uses an ability, and it could very easily descend into player killing fucktardery especially since it might require permadeath. But it's an interesting