First off, is an artifact (historic card), that helps you with casting any of your future historic spells
This version of Trostani sees a lot of play both in the command zone and in the 99, and it even shows up occasionally in cEDH lists
You can also use Sableye to just poke at a few Pokemon to set them up for KOs with Dragonite V or Snorlax
Im a little dubious about using a seven-mana creature as a way to enable reanimatorat that level of mana, you could just start hard-casting the giant creatures
Aside from the far less potent Modern dredge deck, owning four copies of this ridiculously expensive card is just about the only way to play a competitive Dredge deck and in the Vintage format of all places
If you have a Archmage Emeritus on the battlefield when you cast a Casualty spell, you'll be drawing two cards: one for the original, and the second for the copy