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Ertha Jo, Frontier Mentor

First printed in Outlaws of Thunder Junction (2024)

All 2 prints

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  • The List (PLST) #OTJ-203, 2026
  • Outlaws of Thunder Junction (OTJ) #203, 2024

Ertha Jo, Frontier Mentor

Legendary Creature — Kor Advisor

When Ertha Jo enters, create a 1/1 red Mercenary creature token with "tap: 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.

2/4

Illustrated by
Michal Ivan

Legality

Legal in
Standard, Pioneer, Modern, Legacy, Vintage, Future Standard, Historic, Timeless, Gladiator, Commander, Duel Commander, Oathbreaker, Brawl, Standard Brawl, Competitive Brawl
Not legal in
Pauper, Alchemy, Penny Dreadful, Premodern, Old School 93/94, Pauper Commander, PreDH, Tiny Leaders

Rulings (9)
  • Activated abilities contain a colon. They're generally written "[Cost]: [Effect]." Some keyword abilities (such as equip) are activated abilities and will have colons in their reminder text.
  • If the activated ability's cost contains a choice, such as a creature to sacrifice or a number of counters to remove, the copy uses that same information. You can't pay the cost again, even if you want to.
  • If the ability is modal (that is, if it says, "Choose one —" or similar), the mode is copied and can't be changed.
  • The source of the copy is the same as the source of the original ability.
  • The copy made by Ertha Jo's triggered ability is created on the stack, so it's not "activated."
  • The copy will have the same targets as the ability it's copying unless you choose new ones. You may change any number of the targets, including all of them or none of them. The new targets must be legal.
  • If an ability is linked to a second ability, copies of that ability are also linked to that second ability. If the second ability refers to "the exiled card," it refers to all cards exiled by the ability and the copy. For example, if one of Helvault's activated abilities is copied and two cards are exiled, they both return when Helvault is put into a graveyard from the battlefield.
  • If the ability divides damage or distributes counters among a number of targets, the division and number of targets can't be changed. If you choose new targets, you must choose the same number of targets.
  • Any choices made when the ability resolves won't have been made yet when it's copied. Any such choices will be made separately when the copy resolves.

Prices

MTGO price: 0.003 TIX, the cheapest non-foil print (average sell price on GoatBots, 1 Nov 2026).

In Limited on MTG Arena

Win rates in Arena drafts and sealed, retrieved from 17Lands (CC BY 4.0).

Set GIH WR vs set IWD Games
Outlaws of Thunder Junction (OTJ), Premier Draft 55.9% +1.7 +3.2 27745
Outlaws of Thunder Junction (OTJ), Sealed 54.7% -0.6 -1.2 1312
GIH WR
win rate of the games in which the card was in the opening hand or drawn
vs set
points above or below the average win rate of all decks in the set
IWD
improvement when drawn: GIH WR minus the win rate when the card stayed in the library
Games
games in which the card was seen

Combos

74 combos, the most popular first:

See all 74 on Commander Spellbook