Later in the game graveyards will build naturally and cards may not need to be sacrificed
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Goblin Warchief 1
There will be cards in red to compliment this one, like Goldspan Dragon or Rain of Riches (also from NCC), and Rakdos decks with sac outlets can pressure the choice of their opponents too because they likely wont want to see their most threatening creature sacrificed

Aang, Swift Savior Absolute Virtue Abuelo, Ancestral Echo Aerial Engineer Alquist Proft, Master Sleuth Arcade Gannon Arcanist's Owl Archon of the Triumvirate Armored Guardian Ascended Lawmage Augury Adept Aven Mimeomancer Aven Wind Guide Ayesha Tanaka Ayesha Tanaka, Armorer Azor's Elocutors Azor, the Lawbringer Azorius First-Wing Azorius Guildmage Azorius Knight-Arbiter Azorius Skyguard Azorius thermage Barrenton Cragtreads Battlewise Hoplite Belisarius Cawl Black Bolt, Inhuman King Black Panther, Hope Enduring Boromir, Gondor's Hope Brago, King Eternal Brine Comber Bruna, Light of Alabaster Captain America, Living Legend Cat-Owl Celestial Regulator Cephalopod Sentry Chrome Courier Cid, Timeless Artificer Cirina Bargainspinner Cloudblazer Council of the Absolute Crystalline Sliver Cunning Breezedancer Daxos of Meletis Deepchannel Duelist Deepway Navigator Deft Duelist Dennick, Pious Apparition Dennick, Pious Apprentice Denry Klin, Editor in Chief Departed Soulkeeper Deputy of Acquittals Deputy of Detention Devoted Grafkeeper Don & Leo, Problem Solvers Dorothea, Vengeful Victim Dragon Man, Reformed Robot Dragonlord Ojutai Dream Trawler Drogskol Captain Drogskol Reaver Eclipsed Merrow Elder Owyn Lyons Elite Guardmage Emissary of Soulfire Empyrean Eagle Ephara, Ever-Sheltering Ephara, God of the Polis Epistolary Librarian Errant and Giada Esper Cormorants Ethercaste Knight Ethereal Valkyrie

And in Standard, the mechanic finally realized its potential as a rare buff to monocolor decks all thanks to Faceless Haven