Three colours multiply every mana problem: more pips competing, more tapped lands tempting you, more early turns where the wrong land means ...
Three colours multiply every mana problem: more pips competing, more tapped lands tempting you, more early turns where the wrong land means no play at all. The structure that works is layered — a core of lands that can produce all three colours, duals for the pairs you cast most, and basics enough to keep your ramp and fixing spells live.
Real lands, real text
Seaside Citadel (Land; rarity: uncommon; most recent printing listed by Scryfall: Lorwyn Eclipsed Commander): This land enters tapped.
{T}: Add {G}, {W}, or {U}. Arcane Sanctum (Land; rarity: uncommon; most recent printing listed by Scryfall: Duskmourn: House of Horror Commander): This land enters tapped.
{T}: Add {W}, {U}, or {B}. Crumbling Necropolis (Land; rarity: uncommon; most recent printing listed by Scryfall: Marvel Super Heroes Commander): This land enters tapped.
{T}: Add {U}, {B}, or {R}.
Build from examples like these rather than from ratios copied off the internet. Count the coloured symbols in your spells, look at which turns your deck must cast what, and let those two facts choose the lands — then test, count your stumbles honestly, and adjust.
Build and check your list with the MTGBrew AI deck builder, and browse every card mentioned here in the MTGBrew card database on MTGBrew.
If this topic is on your bench, keep going with Mana Crypt in Commander: Fast Mana, Real Risk — it covers the neighbouring decisions from a different angle, and the two pieces together give you a fuller picture than either one alone.
Keep reading
Keep reading: Mana Crypt in Commander: Fast Mana, Real Risk and Arcane Signet in Commander: Clean Two-Mana Ramp Explained.
The numbers that keep you honest
Tune in small steps. Change two or three cards at a time, play several games, and write down what actually happened rather than what you hoped would happen. Deck building rewards that patience — a list adjusted on evidence converges on its best version, while a list rebuilt after every loss never stays still long enough to be judged.
Most Commander decks start their thinking somewhere in the mid-thirties for land count and adjust for curve, ramp, and card draw — treat that as a starting hypothesis about your deck, never as a law. A low-curve deck with real draw needs fewer lands than a top-heavy deck with none, and five games of honest notes will tell you more than any formula.
COMMENTS