
K-9, Mark I
The Commander
Negative — As long as K-9 is untapped, other legendary creatures you control have ward .
Affirmative — ,
: Target legendary creature can't be blocked this turn.
Doctor's companion (You can have two commanders if the other is the Doctor.)
Guide
Gameplan
Pair K-9 with a Doctor (or another Time Lord/legendary-matters commander) and slip your key legendary attacker through unblocked while protecting your board with ward. K-9 is a cheap, evasive enabler that turns a single big legend into a reliable damage engine, then closes via commander damage or counter-doubling Doctors. Turn to turn you develop legends, protect them with ward, and use the unblockable activation to push lethal or land triggered abilities.
Strengths
- Only 1 mana, so K-9 hits the board early and immediately gives every legend ward
- Repeatable unblockable enables commander-damage kills and combat-trigger abilities
- Doctor's companion gives you a free second commander and a coherent legendary theme
- Mono-blue access to counters, card draw, and protection keeps your evasive threat alive
Weaknesses
- Ward
is easy to pay through with removal-heavy decks
- Both abilities are useless if K-9 is tapped or removed, and it's a fragile 1-mana body
- Heavily reliant on a partner Doctor to provide the actual win threat
- Mono-blue lacks efficient removal and can struggle against go-wide or fast combo decks
Key Cards
- The Tenth Doctor — Suspend-based partner whose time counters and combat triggers love being unblockable via K-9.
- The Fourth Doctor — Rewards spending mana before attacking and wants reliable combat damage that K-9 guarantees.
- The Thirteenth Doctor — Doctor with strong card advantage that pairs naturally with K-9's protection.
- Rite of Replication — Kicked copies and other clone effects multiply your legends, all benefiting from ward.
- Swiftfoot Boots — Stacks hexproof and haste onto your Doctor so the unblockable attacker survives spot removal.
- Cyberman Patrol — Mono-blue legendary support that synergizes with the legends-matter shell.
Upgrade Path
Lean into the best damage-doubling and counter-amplifying Doctor partner, then add evasion-stacking and protection like Lightning Greaves, Heroic Intervention's blue analogs, and clones to fork your threat. Tighten the manabase with fast mana (Sol Ring, Mana Crypt) and add efficient counterspells (Swan Song, Fierce Guardianship) so you can defend the unblockable kill. For higher power, include extra-combat or extra-turn effects to convert a single unblockable attack into a one-shot.
Core Cards
The most-played cards for this commander, built from aggregated deck data (the Mythic Graph). Build public decks to seed it.
Win Conditions
- ▸Commander damage from an unblockable, ward-protected Doctor
- ▸Combat-trigger snowball (time counters, card draw, +1/+1 counters) from connecting every turn
- ▸Big evasive threat backed by mono-blue counter-magic protection
Archetypes
- Voltron — Make a single Doctor unblockable and protected with ward to win via commander damage.
- Control — Mono-blue counterspells and bounce protect your evasive legend while you grind out the game.
- Suspend/Time Counters — Tenth Doctor-style suspend payoffs use K-9's guaranteed combat damage to trigger value.
- Tempo — Cheap enabler plus an evasive threat lets you race and protect with counterspells.
Combos
No combos found for this commander on Commander Spellbook.
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Same color identity (U), by popularity.

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