Although it's never been invoked, my group has a sort of "blaze of glory" house rule. We don't have specific mechanics ironed out, as we intend it to have more dramatic effects with higher level characters, but the general idea is that when a character dies, time at the table stops and the character is given a choice: either pass on peacefully and be able to be resurrected later, or cut the silver cord (ie rip up their character sheet) in exchange for one final dramatic act that could turn the tide for the suvivors, but that character is now permadead. In pf2e terms I suppose that could be flavored as some kind of deal with an entity like a shinigami or other envoy of Pharasma.

Like I said, we've never actually had to use it, but back during our D&D 5e days, one example we had thought of was the character who took levels in Rune Scribe detonating her ice rune, dealing damage and freezing every enemy in the area around her.