Arni Brokenbrow
Legendary Creature — Human Berserker
Haste
Boast — 
: You may change Arni's base power to 1 plus the greatest power among other creatures you control until end of turn. (Activate only if this creature attacked this turn and only once each turn.)
- CMC
- 3
- Mana cost
- Color identity
- R
- Rarity
- rare
- Set
- Kaldheim
- Price
- $0.20
- EDHREC rank
- #15869
Arni Brokenbrow enters as a haste creature with power equal to your highest-power creature on the battlefield — a free size upgrade stapled to a body that can attack immediately. In a deck built around massive power totals, like anything leaning on Zilortha, Strength Incarnate's trample-matters engine, that's a legitimate threat for two mana.
Best Commanders
Commanders with the highest synergy
Zilortha, Strength Incarnate
Zilortha, Strength Incarnate cares about raw power, and Arni Brokenbrow mirrors whatever your biggest threat is — so when Zilortha's dealing trample damage based on power rather than toughness, Arni slots in as a redundant high-power attacker that costs almost nothing to deploy.
Mr. Orfeo, the Boulder
Mr. Orfeo, the Boulder rewards stacking power on individual creatures, and Arni Brokenbrow absorbs that value passively just by entering — it reads your board state and scales up without needing additional investment.
Format Analysis
Where it lives, where it can’t
| Format | Verdict |
|---|---|
| commander | legal |
| legacy | legal |
| modern | legal |
| pioneer | legal |
| standard | not legal |
| vintage | legal |
| pauper | not legal |
| oathbreaker | legal |
Arni Brokenbrow is legal in Commander, Legacy, Modern, Pioneer, Vintage, and Oathbreaker, but its home is Commander by a wide margin. In 60-card formats, a two-mana creature that copies someone else's power is too dependent on board state to be reliable — you want your threats to stand alone, and Arni doesn't. In Commander, the math flips: boards get wide and tall, singleton construction means you're playing Arni alongside your best threats rather than instead of them, and haste on a large body at two mana is genuinely ahead of rate. The Oathbreaker legality is a footnote — the same logic applies, though the tighter 60-card shell limits it there too.
Key Combos
Combo lines featuring this card
Price Context
Current price
$0.20 bulk tier
At $0.20, Arni Brokenbrow is bulk — no reason to hesitate on picking up a copy. Bulk rares with genuine Commander applications tend to stay in this range unless a breakout deck pushes demand, so treat it as a throw-in, not a spec.
Explore
Sources
Mentioned
- Zilortha, Strength Incarnate
- Mr. Orfeo, the Boulder
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.