How Many Lands to Run
Most Commander decks should run between 35 and 38 lands. The exact number depends on your average mana value (MV), the amount of ramp you play, and your game plan. Decks with an average MV below 3.0 can often get away with 35 lands, while decks averaging above 4.0 should push toward 38 or even 39. Always account for your ramp density — 10+ ramp pieces can justify dropping 1-2 lands.
Avg MV 2.5 or lower
34-35 lands with heavy ramp (12+ pieces)
Avg MV 3.0-3.5
36-37 lands — the sweet spot for most decks
Avg MV 3.5-4.0
37-38 lands with solid ramp support
Avg MV 4.0+
38-40 lands — you need every one of them