
Exile the top X cards of your library. You may cast instant and sorcery spells with mana value X or less from among them without paying their mana costs. Then put all cards exiled this way that weren't cast into your graveyard.
Epic Experiment has 6 printings, first in Return to Ravnica (2012). EDHREC ranks it #6,423 among Commander cards. It appears most in Vivi Ornitier decks (2,956 on EDHREC). 3 public decks on TCG run it. It has 5 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.