MTG >Combos >Myr Retriever +Myr Retriever +Altar of the Brood +Heartless Summoning +

Cast

Myr Retriever

, that will cost zero mana and die as soon as it enters the battlefield. With its ability, target another

Myr Retriever

in the graveyard, putting it in your hand. You can repeat the loop infinitely, always milling a card in the process.