Discarding cards is a disadvantage, but like most well designed games, Magic has given us plenty of ways to spin that disadvantage into an advantage
(It has menace and cant block.) Whenever this creature deals combat damage to a player, you draw a card and you lose 1 life
A scalable Toxic Deluge for four mana isn't bad at all, and any deck in Black that loads up its own graveyard is going to want to run this
Unfortunately, its clear WotC doesnt want to use investigate as an evergreen mechanic for generating Clue tokens
If you want Faerie Mastermind for Commander, but dont need it any time soon, we would recommend waiting for the card to rotate out of Standard
Read More: The 10 Best MTG Control Commanders 6 Doubling Season Now, Doubling Season probably belongs higher up on the list, but its frankly an obnoxiously overpriced card, so while we do like it, we cant put it higher than this