37 cards where it’s legal in Commander and the text includes “sacrifice a creature:” and the color identity ≤ R

Ashnod's Altar (Commander Masters #368)
Phyrexian Altar (Double Masters 2022 #311)
High Market (Forgotten Realms Commander #246)
Goblin Bombardment (Modern Horizons 2 #279)
Altar of Dementia (Modern Horizons #218)
Trading Post (Commander Anthology Volume II #225)
Witch's Oven (Throne of Eldraine #237)
Pyre of Heroes (Kaldheim #241)
Blasting Station (Fifth Dawn #107)
Spawning Pit (Duel Decks: Mirrodin Pure vs. New Phyrexia #69)
The Golden Throne (Warhammer 40,000 Commander #157)
Dark-Dweller Oracle (Double Masters 2022 #106)
Culling Dais (Double Masters #246)
Relic Vial (Zendikar Rising #250)
Miren, the Moaning Well (Saviors of Kamigawa #163)
Thermopod (Coldsnap #100)
Jinxed Idol (Tempest Remastered #224)
Helm of Possession (Tempest #291)
Barrage of Expendables (Jumpstart #292)
Carnage Altar (Commander 2013 #238)
Bloodshot Cyclops (Eighth Edition #179)
Bubbling Cauldron (Jumpstart #460)
Shivan Harvest (Invasion #167)
Phyrexian Vault (Duel Decks: Phyrexia vs. the Coalition #21)
Keldon Necropolis (Vintage Masters #300)
Diamond Valley (Masters Edition #175)
Jinxed Ring (Stronghold #137)
Weaponize the Monsters (Ikoria: Lair of Behemoths #140)
Scorched Rusalka (Ravnica Remastered #122)
Life Chisel (Masters Edition III #199)
Skull Catapult (Masters Edition II #219)
Fodder Cannon (Eighth Edition #302)
Blood Rites (Commander 2013 #101)
Eye of Yawgmoth (Nemesis #129)
Orcish Bloodpainter (Coldsnap #94)
Skirsdag Cultist (Modern Masters 2017 #112)
Fiery Bombardment (Eventide #52)

Though this query has ended, its relics still slumber in New Argive.