"Resurrection," Temps says at once "There is this sort of interdimensional magic trading network, created by a being that wanted to preserve magic and figured out that it is hard to destroy something in multiple universes, so Traders are always looking to seed universes with magic, which is easier said than done, so they give 'magic credit'" these last two words are accompanied with air quotes "to people that managed it, we have enough that we can resurrect three at a heavy cost, but with one more we can resurrect three for free. Which doesn't mean you already in, but you see the motivation."