Doubling life loss is a very easy way to turn cards like Zulaport Cutthroat, Blood Artist, and Gray Merchant of Asphodel into quick or even immediate game enders
This is why a Trap Card such as Fiend Griefing can become quite dangerous, as this Common Card not only brings back a card from the opponents GY back into its deck, it also sends a Fiend monster of the players deck into the GY
The standard playing format involves building decks of 60 cards to battle opponents using strategic combinations of attacks, abilities, and resources
That said, it's probably not wise to choose what precon you're going to add to your collection solely based on which face Commander you find the cutest
Being able to search out the Supporter that you want to play to put in your discard pile makes this a fully self-contained archetype that has been played on its own, but has also seen a hybrid deck with Dragapult ex [Twilight Masquerade] or Gholdengo ex [Paradox Rift]
And speaking of reanimation, that's what Colossal Grave-Reaver wants to help out with, as well