Riftbound Deck Probability calculator — compute opening hand odds, turn-by-turn draw rates, and mulligan optimization for competitive Riftbound play.
Riftbound Deck Probability is a free online tool for competitive Riftbound TCG players to calculate the exact probability of drawing specific cards in their opening hand and across subsequent turns. Whether you need Riftbound opening hand odds for a tournament build or Riftbound draw probability for theory-crafting, our engine delivers precise results using hypergeometric distribution and Monte Carlo simulation.
The Riftbound card game features a unique dual-resource system: a 40-card main deck and a separate 12-card rune deck. Our Riftbound probability calculator models both systems independently — compute your main deck draw odds while simultaneously analyzing Riftbound rune color probability to ensure you channel the right colors at the right time.
We also offer probability tools for other TCGs: Yu-Gi-Oh! Deck Probability Calculator and Easy Deck Probability Calculator。
Start by entering your deck composition in the Riftbound calculator card builder. Assign each card a functional type (Starter, Extender, Interaction, Gear, etc.) to enable type-based probability queries. Set your win conditions — for example, "draw at least 1 Starter by turn 1" — and the Riftbound TCG probability engine instantly computes the exact result using Riftbound hypergeometric analysis.
Configure game preconditions: opening hand size (4 cards), going first or second, and mulligan swap count (0-2 cards). The Riftbound turn-by-turn probability timeline shows how your Riftbound opening hand odds improve from T1 through T6, with each bar reflecting the cumulative cards seen.
For the rune deck, set your color distribution (e.g., 7A/5B out of 12) and minimum color requirements. The Riftbound rune probability calculator shows the exact Riftbound draw probability of channeling enough runes of each color by each turn — a critical factor for competitive Riftbound deck building.
The exact mode uses hypergeometric distribution, which gives mathematically precise results. The Monte Carlo simulation runs 10,000 iterations and provides a 95% confidence interval. For single-condition queries, the exact result is always shown.
Yes. Riftbound allows swapping 0-2 cards from your opening hand. The calculator supports selective mulligan simulation — you choose how many cards to swap, and the Monte Carlo engine simulates the mulligan process across thousands of iterations.
Yes. The rune deck (12 cards) is modeled independently from the main deck. You set the color split and minimum requirements, and the calculator shows the exact probability of meeting your rune needs by each turn.
Exact probability uses the hypergeometric formula for guaranteed-correct results. Simulated probability uses Monte Carlo random sampling, which is necessary for complex conditions (multi-tag, mulligan strategies). Both are shown when available.