Or you can set up an engine where you have sacrifice fodders or tokens in play
Syr Alin, the Lion's Claw Syr Armont, the Redeemer Syr Cadian, Knight Owl Syr Carah, the Bold Syr Elenora, the Discerning Syr Faren, the Hengehammer Syr Ginger, the Meal Ender Syr Gwyn, Hero of Ashvale Syr Konrad, the Grim Syr Konrad, the Grim Syr Vondam, Sunstar Exemplar Syr Vondam, the Lucent Syrix, Carrier of the Flame
It can work again and again to make a 4/4 token horde, and you can make multiple tokens as long as you have the mana and the targets
Decks with cards like The Rack and Ensnaring Bridge are always on the edge of playability, and black-based decks in EDH have plenty of ways to punish people by making them discard
Play a mix of cheap-to-cast and expensive-to-cast cards