It puts your whole hand in your graveyard, which of course is useful for decks that want things there, and interacting with your graveyard is something that black naturally does quite well
Even if it requires a bit of setup to successfully pull off, the sneak ability can net some astounding damage for such a low cost, especially in Commander
2 Kessig Wolf Run Lands are notoriously hard to destroy or shut down so having one that can give any creature you control trample and pump it up is amazing
Many of the best white creatures MTG decks rely on arent individually massive, but they become dangerous when the board starts filling up
That is definitely not the case right now in Standard, and there would have to be a lot of crazy Colorless lands and early support spells for this deck to be functional there
As always, the set will be adding a variety of new cards and characters, featured across Starter Decks, booster packs, a new Illumineer's Trove, and more