Well, because Carrion FeederCarrion Feeder is one of only two single-mana, repeatable sac outlets in the game (more on the other one later), and Basilisk CollarBasilisk Collar is on the list of best equipment ever printed, regardless of mana cost
each 100-card deck also comes with a 2-card Collector Booster Sample Pack, 10 double-sided tokens, 1 life tracker, and 1 deck box
One way I can think of would be pairing Slimefoot with Ashnod's Altar and Illusionist's Bracers: with the bracers equipped, use Slimefoot's ability to create two Saprolings, sacrifice them to the altar and ping opponents, then use that mana to repeat the process
That means you're going down a card for early-game acceleration, but you can use the Labyrinth's last ability to add the card back to your hand when you're ready to cast it