Is Frontier Siege good in Commander?

Frontier Siege in Commander — Combos, Decks & Price

Frontier Siege nets two green mana on each of your main phases — four mana per turn cycle for four mana up front, a return that snowballs fast in any dragon or big-creature shell. The Atarka, World Render mode is the ceiling: double strike on every attacking dragon turns a combat step into a game-ending avalanche, and Frontier Siege is the enchantment that keeps both engines running.

Best Commanders

Commanders with the highest synergy

01

Atarka, World Render

64.2% of decks · synergy 0.61

Atarka, World Render decks run Frontier Siege in 64% of lists because the Khans mode alone doubles every dragon's damage output, and the mana mode bankrolls the expensive fatties that fill the board before Atarka swings.

02

Ureni of the Unwritten

55.3% of decks · synergy 0.50

Ureni of the Unwritten triggers on casting spells with the highest power among creatures you control, so Frontier Siege's mana mode lets Ureni decks cast multiple high-power threats in a single turn rather than rationing one per rotation.

03

Ganax, Astral Hunter // Acolyte of Bahamut

30.5% of decks · synergy 0.27

Ganax, Astral Hunter generates Treasure when dragons enter, and Frontier Siege's consistent two-mana injection each main phase means Ganax can cast a dragon, pocket the Treasure, and still have resources to act in the second main — keeping the engine turning without leaning entirely on artifact mana.

04

Eshki, Temur's Roar

15.4% of decks · synergy 0.10

Eshki, Temur's Roar wants to cast big spells every turn, and Frontier Siege provides the consistent mana acceleration that makes that rhythm sustainable across a long game rather than dependent on hitting land drops.

05

Omnath, Locus of Mana

8.2% of decks · synergy 0.07

Omnath, Locus of Mana retains unused green mana between phases, so Frontier Siege's two-mana burst each main phase stacks directly onto Omnath's power and toughness — two free size upgrades per turn cycle without spending a single land drop.

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

Commander is where Frontier Siege does real work — four mana per turn cycle in a dragon or ramp shell is a meaningful engine, and the double-strike mode closes games in the right build. In Legacy, Modern, and Pioneer, Frontier Siege is legal but virtually invisible: four mana for a tap-out enchantment that doesn't affect the board immediately is too slow for any competitive shell in those formats, where the game is often decided before it generates a single return. Oathbreaker is a reasonable second home, particularly under a Planeswalker that wants sustained mana or has combat-focused abilities, but Frontier Siege's best version of itself is always a multiplayer table where you have the time to cash in on the repeatable value.

Key Combos

Combo lines featuring this card

Price Context

Current price

$0.43 bulk tier

At $0.43, Frontier Siege is bulk — and for what it does in Commander dragon decks, that's a significant undercharge. It's been printed enough to stay cheap, so there's no urgency, but it belongs in any dragon or green ramp list that doesn't already run it.