I prefer this in decks that care about the graveyard to make the self-mill into a card advantage engine
It works best in Commander with commanders that care about legendary status like Kethis, the Hidden Hand and Captain Sisay, since it offers a tutorable land in the latter case or fodder in the former
Sheltered By Ghosts is a card that will be in the 75 of every white creature deck next year: if you can guarantee it resolves (with ward creatures or Shardmages Rescue), then it should be a 4-of in the main
Once you have a solid foundation, there are two more ways to improve your collection: 1
Although it has a high equip cost, once it's attached to a creature doubling its abilities can be game-winning
6 Dakkon Blackblade One of Fergusons first-ever pieces for the game, and arguably his most iconic, Dakkon Blackblade is a character who has been referenced many times over the years, with many stepping in to claim his titular sword for their own ends