Ertha Jo, Frontier Mentor
When Ertha Jo enters, create a 1/1 red Mercenary creature token with "{T}: 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.
How Ertha Jo decks play in EDH
Ertha Jo, Frontier Mentor is a Boros commander in white and red costing 2RW, and its legendary creature - kor advisor line shapes the whole deck around it. It makes tokens, so the deck wants ways to pump a wide board and to turn spare bodies into cards or damage. The cards below are the ones Ertha Jo, Frontier Mentor decks actually play most often, grouped by the job they do.
Most-played cards
20 cards · about $74.61Play rates from EDHREC. Prices from Scryfall, refreshed daily.
Ramp (4)
Card draw (3)
Removal (2)
Creatures (7)
Synergy & payoffs (4)
Build the full 100
Grimoire generates a complete, Commander-legal Ertha Jo, Frontier Mentor decklist with a written strategy, a full mana base and live prices — from the whole card pool, or only from cards you already own.
Start with Ertha JoErtha Jo deck questions
What colours can I use in a Ertha Jo, Frontier Mentor deck?
Ertha Jo, Frontier Mentor has a Boros colour identity, so every card in the deck must be white and red or colourless. That includes mana symbols in rules text, not just casting cost.
What are the best cards for Ertha Jo, Frontier Mentor?
The cards played most often in Ertha Jo, Frontier Mentor decks include Gleaming Splendor, Loyal Tutor, Ajani Unrelenting. The full list of staples above is grouped by the job each card does, so you can see the deck's skeleton rather than just a pile of names.
How much does a Ertha Jo, Frontier Mentor deck cost?
The 20 most-played cards shown above come to roughly $74.61 at current market prices. A complete 100-card build costs more, and Grimoire can generate a budget version instead if you set a price ceiling.
Can I build a Ertha Jo, Frontier Mentor deck from cards I already own?
Yes. Import your collection into Grimoire and choose "my cards" when you build. The generator will only use cards you actually own, and the Missing Cards page shows what you would need to buy to finish any list.