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Diagnostic Theory
How to Cut a Commander Deck Without Losing Its Identity
Identity lives in the engine, not in the souvenir drawer. Here is how to cut without turning the deck into someone else's list.
Doc Kit, X.D. · Aug 8, 2026 · Reviewed Aug 17, 2026 · 7 min
Players do not freeze on cuts because they cannot read a mana curve. They freeze because every card feels like a piece of the person who built the deck.
Doc Kit's rule is simple: diagnose the deck, not the player. Then cut the jobs the deck cannot staff.
Identity is a sentence
Write one sentence:
This deck wins by ______ using ______, and it spends early turns on ______.
Everything that does not serve that sentence is a candidate. Everything that serves it is not automatically sacred — it still has to be the best available staff for that job.
Pet cards can stay. They just have to be counted as a cost. A sentimental Elf is a real card. It is also a slot that is not draw, ramp, or protection.
The four cut trays
Discontinue — cards that require a different deck to already be working.
Start — jobs you are understaffing: usually card flow, protection, or a single finish.
Adjust — keep the theme, change the version. A lord that applies to the whole team stays. A lord that applies to a narrower club often goes.
Monitor — cards you are unsure about. Play three to five games before you argue with the clipboard.
What not to do
Do not cut all the fun and leave a gray machine. That is how patients refuse treatment.
Do not add faster mana to an overcrowded list and call it a cure. You will simply lose faster with a prettier board.
Do not copy a content creator's 99 and keep your commander as a hat.
A practical pass
- Pile the 99 into: engine, support, payoff, interaction, land.
- If payoffs outnumber support, you already know the finding.
- Cut from payoffs first, never from the last two protection effects.
- Re-read the sentence. If it still sounds like your deck, the identity survived.
Cuts are not a verdict on taste. They are how a clinic makes room for the plan you actually wanted.
Doc Kit, X.D. is a fictional gaming character. Kit is not a medical doctor. All diagnoses concern games, decks, strategies, or gameplay.