Opening Hand Lands

How likely are you to hit your land drops in your opening hand?

Next Land Drop

Odds of finding a land in the next X draws and scry/surveil triggers. (E.g. chance of finding a third land with 23 in the deck of which 2 in the opening hand.)

Flooding & Fetch Lands

Chance of drawing consecutive lands (flooding), and how fetch lands change the odds by thinning the deck. Each fetch removes one land from the library.

Colored Mana Sources

Deckbuilding check for multi-colored decks. Answer questions like "chance of having UU by turn 3".

Combo Assembly

Chance of assembling an X-card combo, given cards seen.

Mulligan Distribution

Probability of ending up with X lands in your kept hand after mulligans. London mulligan: you draw 7, then put m cards on the bottom (your choice). This assumes you put back to land as close to your target count as possible.

Tron Assembly

P(assembling all 3 Urza lands) by each turn. Tron needs 3 land drops (turn 3 minimum). Maps in hand can fetch a missing piece ({1} to cast, {2} to activate — ready by turn 3).

Storm Setup

Probability helpers for playing Ruby Storm.

Find a Discounter

Chance of finding a cost reducer (Medallion, Ral...) in the next X cards seen.

Cards Seen

How many cards can you expect to look at based on what you have. Estimates expected # seen based on probabilities of chaining another impulsive card draw off the previous one. Note that this effectively assumes infinite mana to keep casting the draw spells.

Impulse Hits

Chance of hitting e.g. a ritual off a Reckeless Impulse.

Affinity

Probability helpers for Modern Affinity.

0-Cost Artifacts

Expected count of zero-mana artifacts (Ornithopter, Memnite, Welding Jar, Bauble...) in your next N cards seen.

Find Kappa / Emry / Krang

P(finding at least one of the key threats) given the cards you've seen.

Cards Seen

Sum of cards seen from draws and Affinity's card-selection sources.