Arcane Foundry › Commanders › Ertha Jo, Frontier Mentor
Ertha Jo, Frontier Mentor
Legendary Creature — Kor Advisor · {2}{R}{W} · Red/White commander
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.
Build an Ertha Jo, Frontier Mentor deck →
What Ertha Jo, Frontier Mentor actually does
Read off the card by the same engine the Forge and Analyzer use — this is the mechanical classification, not a summary.
- Triggered ability · etbWhen 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."
- Triggered ability · otherWhenever you activate an ability that targets a creature or player, copy that ability. You may choose new targets for the copy.
What an Ertha Jo, Frontier Mentor deck wants
The plan the Forge derives for this commander: the roles it fills and how many of each.
- 8× Put haste on the commander the turn it resolves — a tap ability is unusable otherwise
- 5× Untap the commander so the tap ability is an engine, not a one-shot
- 6× Exile a permanent you control and return it — the button a value-ETB deck presses
- 12× A permanent whose value is in its enter-the-battlefield trigger — the payload a blink deck reuses
- 8× A permanent whose value is in its enter-the-battlefield trigger — the payload a blink deck reuses
- 4× A team pump that actually pumps tokens
- 12× Make creature tokens — a static anthem or a go-wide commander needs a board to be wide
- 5× Actually remove one problem permanent — preventing its damage is not removing it
- 1× Answer a whole board at once
Best cards for Ertha Jo, Frontier Mentor
Ranked by an engine that reads what each card does — its real cost, its delay and how reliably it works — rather than counting how often other people play it.
Put haste on the commander the turn it resolves — a tap ability is unusable otherwise
- Rising of the Day3 mana
- Thousand-Year Elixir3 mana
- Fable of the Mirror-Breaker // Reflection of Kiki-Jiki3 mana
- Goblin Chieftain3 mana
- Blacksmith's Talent1 mana
- The Fire Crystal4 mana
- Cloudshredder Sliver2 mana
- Lightning Greaves2 mana
Untap the commander so the tap ability is an engine, not a one-shot
- Aggravated Assault3 mana
- Aurelia, the Warleader6 mana
- Reconnaissance1 mana
- Sword of Feast and Famine3 mana
- Amulet of Vigor1 mana
- Sting, the Glinting Dagger2 mana
- Umbral Mantle3 mana
- Genji Glove5 mana
Exile a permanent you control and return it — the button a value-ETB deck presses
- Airbender Ascension2 mana
- Eldrazi Displacer3 mana
- Eternal Acrobat Toast0 mana
- Conjurer's Closet5 mana
- Distinguished Conjurer2 mana
- Felidar Guardian4 mana
- Restoration Angel4 mana
- Teleportation Circle4 mana
A permanent whose value is in its enter-the-battlefield trigger — the payload a blink deck reuses
- Chrome Mox0 mana
- Temple of Triumph0 mana
- Boros Garrison0 mana
- Cabaretti Courtyard0 mana
- Elegant Parlor0 mana
- Lotus Field0 mana
- Riveteers Overlook0 mana
- Talon Gates of Madara0 mana
A permanent whose value is in its enter-the-battlefield trigger — the payload a blink deck reuses
- Chrome Mox0 mana
- Temple of Triumph0 mana
- Boros Garrison0 mana
- Cabaretti Courtyard0 mana
- Elegant Parlor0 mana
- Lotus Field0 mana
- Riveteers Overlook0 mana
- Talon Gates of Madara0 mana
A team pump that actually pumps tokens
- Intangible Virtue2 mana
- Caretaker's Talent3 mana
- Inspiring Leader3 mana
- Prava of the Steel Legion3 mana
- Mite Overseer4 mana
- Phantom General4 mana
- Nesting Grounds0 mana
- Boros Charm2 mana
Make creature tokens — a static anthem or a go-wide commander needs a board to be wide
- Dalkovan Encampment0 mana
- Anim Pakal, Thousandth Moon3 mana
- Elenda's Hierophant3 mana
- Pashalik Mons3 mana
- Hero of Bladehold4 mana
- Myrel, Shield of Argive4 mana
- Siege-Gang Lieutenant4 mana
- Parhelion II // Parhelion II0 mana
Actually remove one problem permanent — preventing its damage is not removing it
- Path to Exile1 mana
- Swords to Plowshares1 mana
- Wild Magic Surge2 mana
- March of Otherworldly Light1 mana
- Flicker of Fate2 mana
- Generous Gift3 mana
- Erode1 mana
- Getaway Glamer1 mana
Answer a whole board at once
- Final Showdown1 mana
- Vanquish the Horde8 mana
- Martyr's Cry2 mana
- Split Up3 mana
- Blasphemous Act9 mana
- Cathedral Membrane2 mana
- Citywide Bust3 mana
- Harsh Mercy3 mana
Build this deck in the Arcane Forge →
Arcane Foundry is free to join and every tool is included: the Arcane Forge deck builder, the ARCANE Analyzer that scores a deck by simulating games rather than counting staples, a card scanner, a collection vault, and live webcam Commander tables.
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