One opening hand.
One more chance.
Compare the first draw with one deliberate mulligan. Understand consistency before changing your Tetramon deck.
Set up the draw
For a real Tetramon opening use 50 / your target copies / 5. Other deck and hand sizes are hypothetical. Several card names can form one target group only if any of them meets the same need.
One bottom-then-redraw mulligan
Keep the first hand if it contains at least your chosen minimum. Otherwise put that entire hand on the bottom and draw a new hand of the same size from the remaining cards. The result describes the hand you keep, not targets collected across both hands.
When the first hand always meets your target, the conditional replacement result is “Not needed.” The redraw model requires two full hands to fit in the deck; larger draws still have valid first-hand results.
Compare one to four copies
| Target copies | First hand | With one mulligan |
|---|---|---|
| 1 | 10.00% | 20.00% |
| 2 | 19.18% | 36.33% |
| 3 | 27.60% | 49.59% |
| 4 | 35.30% | 60.32% |
Only the target-copy count changes. This does not rank cards, model a complete evolution pair or recommend four copies of every card.
Why two fresh shuffles is the wrong model
With four target copies in 50 cards, a five-card first hand succeeds 35.30% of the time. After a zero-target miss, all four targets are still among the other 45 cards. That makes the conditional replacement chance 38.66%, not another 35.30% attempt.
Combining keeping a hit with redrawing a miss gives 60.32%. These are calculated examples under the stated policy, not measurements of the game’s random-number generator.
Exact calculation, including larger targets
For N cards, K targets and n draws, P(X = k) = C(K,k) × C(N−K,n−k) ÷ C(N,n). We sum qualifying outcomes for the first-hand result.
For a target count m, the final result is P(X ≥ m) + Σ P(X = x) × P(Y ≥ m | X = x), summing failed first hands x < m. The replacement hand draws n cards from N−n, with K−x targets remaining. Targets in a rejected hand are not counted as successes in the kept hand.
What this tool does not decide
It does not model card effects, known Guardian cards, search effects, later turns, battle outcomes or every strategic reason to keep a hand. The rule source predates release: your installed Workbench rulebook takes precedence if its ordering differs. A target group is not a complete deck plan.
Use the deck planner for counts, the beginner workflow for construction, or duel troubleshooting for missing prompts and timing questions.
Source-reviewed . Recommendations are editorial guidance, not in-game benchmark results.
Ding Shen Sia — Tetramon Duel Master introduction, Xbox Wire Developer-authored introduction. Published before 1.0; use the live Workbench rulebook if anything differs.