31.42 + 3.13 × average mana value − 0.28 × (cheap card draw / mana ramp spells).
Calibrated for a 100-card deck, with MDFCs counted partially as lands. Find the average Mana Value of your SPELLS and move the slider to match. If you would like a generalized analysis of your deck's draw + ramp, then paste and analyze your deck below. If not, you may move the slider manually.
37–38
Approximate minimum number of lands
31.42 + 3.13 × 3.00 − 0.28 × 12 = 37.45
Start with 42 lands. Cut one land for roughly every 3–4 cheap card draw or mana ramp spells.
Decklist
Paste a decklist in the MTGO format. This only works with a 100-card list and will fail to check any cards with alternative names from "the Omenpaths". Any SIDEBOARD: or MAYBEBOARD: section is ignored. It checks Scryfall's Tagger data for cards
tagged ramp or draw with mana value below 4 (which includes lands), then updates the "cheap card draw / mana
ramp spells" slider and the average mana value slider above automatically after analysis. This is the only part of the app that needs internet.
It calls Scryfall's public API for a moment when you click Analyze.
0
ramp/draw spells (mv < 4)
Weighted by quantity in your list. Based on Scryfall's oracle tags ramp and draw, filtered to mana value under 4.
Avg MV of spells—
Matched cards
Hypergeometric Calculator
Exact odds of drawing a given number of "successes" (lands, removal, whatever card type you're tracking) out of the
cards you've seen so far. Uses arbitrary-precision integer math, so there's no floating-point rounding error.
e.g. number of lands, ramp spells, or a card category
opening hand + draws by the turn in question
Exactly t
—
At least t
—
At most t
—
Full probability distribution (highlighted bar = target t)
Probability
Number of successes (t)
19.59 + 1.90 × average mana value − 0.28 × (cheap card draw / mana ramp spells) + 0.27 if you have a companion.
Calibrated for a 60-card minimum deck. Find the average Mana Value of your SPELLS and move the slider to match. If you would like a generalized analysis of your deck's draw + ramp, then paste and analyze your deck below. If not, you may move the sliders manually.
21–22
Approximate minimum number of lands
19.59 + 1.90 × 2.00 − 0.28 × 8 = 21.15
Start with 26 lands. Cut one land for roughly every 3–4 cheap card draw or mana ramp spells.
Decklist
Paste a decklist in the MTGO format. This works with a 60-card minimum, 250-card maximum list (MTG Arena's limit) and will fail to check any cards with alternative names from "the Omenpaths". Any SIDEBOARD: or MAYBEBOARD: section is checked separately, up to 15 cards without a notice. It checks ramp and draw Scryfall Tagger data with mana value below 4 (which includes lands), then updates the ramp/draw and average mana value sliders above automatically after analysis. If you want to see how one specific card changes the land count, edit it in the text field above and re-analyze, or check in your deckbuilder of choice, since this tool only reports on the list as a whole. This is the only part of the app that needs internet.
0
ramp/draw spells (mv < 4)
Weighted by quantity in your list. Based on Scryfall's oracle tags ramp and draw, filtered to mana value under 4.
Matched cards
Hypergeometric Calculator
Exact odds of drawing a given number of "successes" (lands, removal, whatever card type you're tracking) out of the
cards you've seen so far. Uses arbitrary-precision integer math, so there's no floating-point rounding error.
e.g. number of lands, ramp spells, or a card category
opening hand + draws by the turn in question
Exactly t
—
At least t
—
At most t
—
Full probability distribution (highlighted bar = target t)