
Draw four cards, then choose X cards in your hand and discard the rest.
Breakthrough has 5 printings, first in Torment (2002). EDHREC ranks it #10,163 among Commander cards. It appears most in Rielle, the Everwise decks (1,805 on EDHREC).
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.