Higher grades, especially 9 or 10, can significantly increase a cards value
What if Spencer plays out a combo like Kiki-Jiki, Mirror Breaker and Zealous Conscripts, making enough creatures to kill me and all other players at the table
Creature Human Soldier2/2 Whenever another creature you control with power 2 or less enters, you may pay
Yawgmoths Bargain was eventually relegated to the role of Vintage one-of that wins the game for Dark Ritual decks. Lands (13) Spells (47) 1 Tendrils of Agony 1 Brainstorm 2 Cabal Ritual 1 Yawgmoth's Bargain 1 Vampiric Tutor 1 Yawgmoth's Will 4 Duress 1 Necropotence 1 Mana Vault 1 Wheel of Fortune 1 Sol Ring 1 Demonic Tutor 2 Hurkyl's Recall 1 Time Walk 4 Dark Ritual 1 Ancestral Recall 1 Mana Crypt 1 Timetwister 3 Cabal Therapy 1 Mind's Desire 1 Black Lotus 1 Lotus Petal 1 Lion's Eye Diamond 1 Mox Emerald 1 Mox Jet 1 Mox Pearl 1 Mox Ruby 1 Mox Sapphire 1 Ponder 4 Gitaxian Probe 4 Dark Petition Sideboard Dark Petition, in particular, is a great way to find cards like Yawgmoths Bargain and #3: Necropotence Necropotence is like three-quarters of a Yawgmoths Bargain at half the price

There's also Pitiless Plunderer and Morbid Opportunist here which I thought would hint at a Sacrifice subtheme here but nope, there's 1 sac outlet in the entire deck (Shadow, Mysterious Assassin) and like two or three cards that sacrifice themselves (Priest of Fell Rites) so maybe these are either random "hope for value" inclusions or maybe the remnants of a previous version of the deck that focused more on Sacrifice, who knows