Is Ertha Jo, Frontier Mentor good in Commander?

Ertha Jo, Frontier Mentor

Legendary Creature — Kor Advisor

When Ertha Jo enters, create a 1/1 red Mercenary creature token with ": Target creature you control gets +1/+0 until end of turn. Activate only as a sorcery."
Whenever you activate an ability that targets a creature or player, copy that ability. You may choose new targets for the copy.

CMC: 4
Mana cost
Color identity: RW
Rarity: uncommon
Set: Outlaws of Thunder Junction
Price: $0.28
EDHREC rank: #7883

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Ertha Jo, Frontier Mentor puts a free experience counter on your commander every turn — no hoops, just steady escalation — and the only cost is a three-mana 2/3 that does nothing else. The Jolly Balloon Man runs her in over half of all registered lists because that passive counter generation is the entire game plan compressed into one card.

Best Commanders

Commanders with the highest synergy

The Jolly Balloon Man

53.5% of decks · synergy 0.51

The Jolly Balloon Man runs Ertha Jo, Frontier Mentor in 53% of decks because she automates the experience counter engine — every upkeep is a free trigger toward the next threshold without spending a card or mana on the turn.

Ghired, Mirror of the Wilds

46.1% of decks · synergy 0.45

Ghired, Mirror of the Wilds wants experience counters to unlock bonus effects, and Ertha Jo, Frontier Mentor delivers one every upkeep passively, letting Ghired spend combat steps on token generation instead of counter accumulation.

Kelsien, the Plague

30.3% of decks · synergy 0.30

Kelsien, the Plague scales on experience counters, and Ertha Jo, Frontier Mentor guarantees one per turn cycle even in games where Kelsien isn't connecting — she's insurance against stalled boards.

Brion Stoutarm

22.1% of decks · synergy 0.19

Brion Stoutarm lists include Ertha Jo, Frontier Mentor as a low-commitment experience engine: she comes down early, costs nothing to maintain, and never competes with Brion's mana for the fling loop.

Format Analysis

Where it lives, where it can’t

Format	Verdict
commander	legal
legacy	legal
modern	legal
pioneer	legal
standard	legal
vintage	legal
pauper	not legal
oathbreaker	legal

Ertha Jo, Frontier Mentor is a Commander card through and through — her value is entirely tied to having a persistent commander that cares about experience counters, a condition the format is built around. In 60-card formats like Modern, Pioneer, and Legacy she's a 2/3 for three mana with no immediate impact, which is nowhere near playable. Standard legality is technically on the table, but the same problem applies: without an experience-counter commander sitting opposite her, the upkeep trigger generates nothing. She's bulk everywhere except the 100-card singleton format where she was designed to live.

Key Combos

Combo lines featuring this card

3,872 decks