How to diagnose and repair a Commander deck

Review the deck’s basic functions before changing its identity. Repair a small number of weak slots, then test whether games improve.

1. Import a complete list and protect your theme engines.
2. Look at lands, draw, ramp, removal, and wipes. The initial targets are heuristics, with overlapping roles.
3. Review the largest gaps and the suggested cuts. The planner avoids reducing another tracked role below its target.
4. Accept a small affordable package, compare the before and after role counts, and export the list.
5. Apply the edits and diagnose again. Use actual games to judge opening hands, available colors, and recovery after a board wipe.

What the method checks

Commander color identity, current Commander legality, duplicate singleton cards, protected cards, cumulative purchase cost, existing cards, and the selected table’s Game Changer constraint. Spell-role and theme matching remain heuristics; inspect the actual rules text.

Example workflow

Use the real Reap the Tides precon example in the tool. Compare a $25 package with a $50 package, select the changes you would play, and reanalyze the edited list. The live result depends on current prices and the stock list.

Can this tool guarantee a winning or correctly rated deck?

No. It produces a review plan using live card data, role heuristics, and constraints. Decisions about synergy, play patterns, and table intent require player review.

Do I need an account?

No. Drafts and recent review inputs stay on your device. Shared links carry the deck list; the recipient runs a fresh analysis.

How are prices and owned cards handled?

Scryfall nonfoil prices are estimates. Owned additions have no purchase cost. Shipping, tax, and sales of removed cards are not included.

Sources

• Scryfall card data and pricing
• MTGJSON stock deck data
• Current Commander format and brackets

Method reviewed October 7, 2026.