You know code vein? What happens if you mix it with Bloodborne in any world you want but having a "accession" from draining great ones blood seems neat.
Snow on Mt. Silver.. A creepy pasta of gold just freezing death on a mountain and you slowly die.. I'd love to see ghost and ice type Pokemon trainer.. mostly a reincarnation perhaps a ice leg and a ghost arm? seems miss matched.. their main Pokemon? Frostlass. And make them more like a crass gangster willing to pick up a pipe to bash you if you are a threat and bash a Pokemon.