mtg cards every commander deck needs Seven Decks Player Should Own Wizards Of The Coast's Official

Especially ones that play Crucible of Worlds effects

Nashi is also restricted by only getting one of those cards, and needing it to be castable this turn

Mogis, God of Slaughter EDH Creature (7) 1x Erebos, God of the Dead 1x Fanatic of Mogis 1x Gray Merchant of Asphodel 1x Indulgent Tormentor 1x Purphoros, God of the Forge 1x Sire Of Insanity 1x Zo-Zu the Punisher Land (38) Enchantment (29) 1x Baneful Omen 1x Blood Reckoning 1x Bloodchief Ascension 1x Burning Earth 1x Dictate of the Twin Gods 1x Furnace of Rath 1x Grave Pact 1x Havoc Festival 1x Hissing Miasma 1x Leyline of Punishment 1x Leyline of the Void 1x Liliana's Caress 1x Manabarbs 1x Megrim 1x Pain Magnification 1x Painful Quandary 1x Polluted Bonds 1x Pyrohemia 1x Rain of Gore 1x Shrieking Affliction 1x Spiteful Visions 1x Stranglehold 1x Sulfuric Vortex 1x Tainted Remedy 1x Underworld Dreams 1x Vicious Shadows 1x War's Toll 1x Widespread Panic 1x Wound Reflection Artifact (6) Instant (2) Sorcery (18) 1x Anger of the Gods 1x Blasphemous Act 1x Blightning 1x Chain Reaction 1x Decree of Pain 1x Earthquake 1x Exsanguinate 1x Insurrection 1x Killing Wave 1x Life's Finale 1x Mind Shatter 1x Molten Disaster 1x Mutilate 1x Rakdos's Return 1x Syphon Flesh 1x Syphon Mind 1x Unnerve 1x Vandalblast

Yes, just a dollar shy of $40,000

They let you cycle for lands so cheaply that you can often play them instead of a basic land and treat them like a tap land that fixes your colors