K-9, Mark I appears in 209 public decks. The most-played cards are Sol Ring, Command Tower and Arcane Signet. The strongest synergies by lift are Flare of Denial, Trenzalore Clocktower and TARDIS.

Artifact

Land

Artifact

Basic Land — Island

Land

Enchantment

Basic Land — Plains

Instant

Land

Land

Land

Legendary Land

Instant

Basic Land — Mountain

Enchantment

Instant

Instant

Land

Artifact Creature — Human Soldier

Instant

Land — Island Mountain

Legendary Artifact

Land

Land

Land — Plains Island

Land

Land — Island Mountain

Instant

Land

Instant

Instant

Land

Instant

Artifact — Equipment

Artifact

Instant

Legendary Artifact

Land

Artifact

Land — Plains Island

Legendary Creature — Monkey Pirate

Artifact — Vehicle

Instant

Instant

Enchantment

Instant

Sorcery

Artifact

Land — Mountain Plains

Artifact

Artifact

Artifact — Equipment

Instant

Legendary Land

Artifact

Instant — Trap

Sorcery

Legendary Land

Artifact

Enchantment

Instant
In 25% of these decks, 23× its usual rate.

Legendary Land
In 27% of these decks, 8.4× its usual rate.

Artifact — Vehicle
In 28% of these decks, 8.0× its usual rate.

Legendary Artifact
In 30% of these decks, 7.3× its usual rate.

Artifact
In 27% of these decks, 3.9× its usual rate.

Sorcery
In 28% of these decks, 3.6× its usual rate.

Instant
In 25% of these decks, 3.6× its usual rate.

Artifact
In 27% of these decks, 3.5× its usual rate.

Legendary Creature — Monkey Pirate
In 29% of these decks, 3.1× its usual rate.

Legendary Artifact
In 33% of these decks, 3.1× its usual rate.

Artifact
In 25% of these decks, 3.0× its usual rate.

Instant
In 27% of these decks, 2.8× its usual rate.
No public Brawl lists for this commander yet — Moxfield lists are excluded from the public catalogue.
Win rates by rank for Arena Brawl decks: Brawl decks on Untapped.gg.