Legendary Creature — Human Knight

Arna Kennerüd, Skycaptain

Mana value5EDHREC#6,915

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The Commander

Flying, lifelink

Ward—Discard a card.

Whenever a modified creature you control attacks, double the number of each kind of counter on it. Then for each nontoken permanent attached to it, create a token that's a copy of that permanent attached to that creature.

Guide

Gameplan

Arna is a counters-and-attachments payoff: suit up creatures with Auras, Equipment, and counters, then attack to double every counter and copy each nontoken permanent attached to the attacker. This snowballs board presence and stats explosively, turning one well-equipped creature into a game-ending threat while Arna herself flies, gains life, and dodges removal. You generally win through one or two overwhelming modified attackers backed by a steady stream of free Aura/Equipment copies.

Strengths

Doubling counters every combat creates exponential power growth that quickly outpaces the table
Copying nontoken Auras and Equipment gives free value engines and can spread buffs across creatures
Flying, lifelink, and Ward—discard a card make Arna a resilient, evasive attacker in her own right
Esper colors offer the best counter-doubling, proliferate, and protection support in the format

Weaknesses

Heavily reliant on a single modified creature, so targeted or sweeper removal sets you back hard
Vulnerable to combat tricks, blockers, and fogs since the payoff only triggers on attack
Setup-intensive: needs counters or attachments before Arna's ability matters
Three-color mana base and equip/aura costs can be demanding on resources

Key Cards

Ardenn, Intrepid Archaeologist — Freely moves and re-attaches the Auras and Equipment Arna copies, multiplying value each turn.
Shield of the Realm — Cheap Equipment that copies into a stack of protection while Arna's trigger snowballs.
Doubling Season — Stacks with Arna's counter doubling for absurd, immediate counter growth.
Skullclamp — Token copies attached to creatures turn into a relentless card-draw engine.
Cathars' Crusade — Every token Arna creates feeds counters back onto your board for explosive scaling.
Sword of Truth and Justice — Copies generate extra protection and proliferate triggers while doubling its +1/+1 counter output.

Upgrade Path

Add more proliferate and counter-doublers (Hardened Scales, Branching Evolution, Inexorable Tide) to amplify Arna's trigger, and lean on cheap, high-impact Equipment and Auras that benefit from being copied. Improve protection with Swiftfoot Boots, Lightning Greaves, and the Mythos/Sword cycle to keep your attacker alive, and tighten the mana base with fast lands and ramp so you can deploy Arna and suit up on the same turn.

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 or a massively pumped modified creature swinging for lethal
▸Going wide with copied buffs and counters via effects like Cathars' Crusade
▸Lifelink combat plus evasion grinding opponents out while you outvalue removal
▸Infect or trample voltron one-shots enabled by doubled counters

Archetypes

Voltron — Arna's doubling and attachment-copying turn one suited-up creature into a one-shot kill.
+1/+1 Counters — Her attack trigger doubles every counter kind, making counter synergies snowball uncontrollably.
Auras/Equipment Aggro — Each attack copies attached gear, building a wide, modified battlefield fast.
Blink/Value — Copied ETB-laden Auras and Equipment-tokens generate recurring advantage.