Deck Builder

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Avatar

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Spellbook

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Atlas

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Avatar

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Spellbook

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Atlas

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Deck Stats

Add cards to see thresholds and mana curve.

Threshold Costs (Click to Select)

Count

Threshold Generation (Click to Select)

Count

Deck Breakdown (Click to Select)

Subtypes

Sites

Rarities

Mana Curve (Click to Select)

Draw Odds

(Experimental)

Opening Hand Odds

(3 Spellbook + 3 Atlas)

Costs: | |

Spellbook mulligan: | | |

Draw Odds by Card

At least by draw

At least

by draw

Export Deck

We will copy your decklist lines for TCGplayer Mass Entry.

Click Copy and Open TCGPlayer or copy manually.
Review the lines in TCGplayer Mass Entry.
Run search and confirm card matches before checkout.

Experimental: TCGplayer parsing can fail for some entries. Compatible uses name-only lines (most robust), while Accurate includes finish and set tags for higher specificity.

Add Deck Collection Add Deck Maybeboard

Duplicate cards across Spellbook, Atlas, Collection, and Maybeboard will have quantities combined.

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Include Maybeboard

Collection cards are always included.

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Card Details

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How Draw Odds Work

All odds use exact card counts from your deck and assume opening hands draw 3 cards from the Spellbook and 3 from the Atlas without replacement. Here "cost" means mana cost; thresholds are the elemental requirements on spells and sites. Atlas thresholds are summed across drawn sites (a 2‑fire site contributes 2 fire).

Opening Hand Cost Odds: each selected cost shows the Spellbook-only chance to open at least one spell of that exact cost, and if you select multiple costs we also show one combined union row for the full selected set.
Playable Opening Hand Odds: chance that your opening Spellbook hand contains at least one selected-cost spell and your opening Atlas hand provides enough thresholds to play at least one of those drawn spells. We enumerate all possible opening Spellbook and Atlas hands and compute the exact chance the opening hands meet at least one drawn requirement.
Card Odds (Spellbook): chance to draw at least X copies of a selected spellbook card by the Nth draw from the Spellbook. The first 3 draws are the opening hand; draw count refers to draws from that deck (not turns), capped by deck size.
Card Odds (Atlas - Site): chance to draw at least X copies of a selected site by the Nth draw from the Atlas.
Card Odds (Atlas - Threshold): chance that the Atlas draws produce at least X total thresholds of the chosen element, summing the thresholds printed on each drawn site.
Spellbook Mulligan: for now this is modeled as extra Spellbook draws only. Mulligan 1 means the opening Spellbook odds use 4 Spellbook draws, Mulligan 2 uses 5, and Mulligan 3 uses 6. Atlas draws stay at 3.
Method: exact combinatorics (not simulation), so results are deterministic for a given deck.