Faerie Mastermind As far as punishing your opponents for drawing cards goes, Faerie Mastermind isnt Sheoldred, the Apocalypse or Orcish Bowmasters
All of those are amazingly good Commander level quality auras
It is, itself, a 2/2, and it can produce a bunch more 2/2s (likely after a sweeper), so it powers your synergies with Dusk // Dawn, Return of the Wildspeaker, and more
An extremely popular land card, especially when playing Commander
Any deck that cares about self-mill will have plenty of options for getting cards into the graveyard, with Sultai-based dredge decks able to capitalize most readily
Cards like Thousand-Year Elixir, Magewright's Stone, and protection such as Swiftfoot Boots help keep it active every turn