Ertha Jo, Frontier Mentor

Legendary Creature — Kor Advisor · from $0.28

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 with this commander Start with a starter shell Card details, printings & prices

A typical Commander deck

A starting template, not a rule — counts to fill in around the commander.

Lands3736–38 for most decks; fewer with cheap curves
Ramp10mana rocks, dorks, land ramp — mostly 2–3 mana
Card draw10repeatable engines beat one-shot cantrips
Targeted removal6answers for creatures AND artifacts/enchantments
Board wipes3sweepers reset boards you've lost
Synergy & win conditions33the deck's actual plan

Staples in these colors

The 100 cards that fit this color identity in the most EDHREC decklists (EDHREC rank via Scryfall).

Budget

55 of 100 at $5 or less · 37 at $1 or less

#	Card	Type	MV	Price
1	Sol Ring	Artifact	1	$1.07
2	Command Tower	Land	0	$0.26
3	Arcane Signet	Artifact	2	$0.34
4	Exotic Orchard	Land	0	$0.19
5	Reliquary Tower	Land	0	$4.28
6	Swords to Plowshares	Instant	1	$0.98
7	Swiftfoot Boots	Artifact	2	$1.43
8	Lightning Greaves	Artifact	2	$3.86
9	Path of Ancestry	Land	0	$0.16
10	Path to Exile	Instant	1	$0.71
11	Fellwar Stone	Artifact	2	$0.47
12	Rogue's Passage	Land	0	$0.31
13	Evolving Wilds	Land	0	$0.09
14	Thought Vessel	Artifact	2	$2.23
15	Blasphemous Act	Sorcery	9	$0.72
16	Terramorphic Expanse	Land	0	$0.10
17	Chaos Warp	Instant	3	$0.32
18	Myriad Landscape	Land	0	$0.25
19	Mind Stone	Artifact	2	$0.21
20	Polluted Delta	Land	0	$19.85
21	Flooded Strand	Land	0	$12.78
22	Skullclamp	Artifact	1	$4.85
23	Solemn Simulacrum	Creature	4	$0.27
24	Misty Rainforest	Land	0	$35.98
25	Bloodstained Mire	Land	0	$14.54
26	Fabled Passage	Land	0	$0.65
27	Windswept Heath	Land	0	$11.19
28	Wooded Foothills	Land	0	$17.96
29	Verdant Catacombs	Land	0	$29.16
30	Scalding Tarn	Land	0	$36.86
31	Marsh Flats	Land	0	$32.04
32	Commander's Sphere	Artifact	3	$0.19
33	Arid Mesa	Land	0	$31.40
34	Generous Gift	Instant	3	$0.93
35	Smothering Tithe	Enchantment	4	$56.09
36	Ancient Tomb	Land	0	$56.94
37	Sacred Foundry	Land	0	$10.28
38	Deflecting Swat	Instant	3	$70.85
39	Urborg, Tomb of Yawgmoth	Land	0	$56.13
40	Yavimaya, Cradle of Growth	Land	0	$16.76
41	Clifftop Retreat	Land	0	$0.19
42	Esper Sentinel	Creature	1	$58.03
43	Temple of the False God	Land	0	$0.19
44	Chromatic Lantern	Artifact	3	$0.38
45	City of Brass	Land	0	$9.17
46	The One Ring	Artifact	4	$109.88
47	Faithless Looting	Sorcery	1	$0.36
48	Vandalblast	Sorcery	1	$1.74
49	Jeska's Will	Sorcery	3	$39.58
50	Teferi's Protection	Instant	3	$34.90
51	Cavern of Souls	Land	0	$47.72
52	Mana Confluence	Land	0	$34.75
53	Urza's Saga	Enchantment	0	$34.67
54	Battlefield Forge	Land	0	$0.20
55	Lotus Petal	Artifact	0	$35.11
56	Enlightened Tutor	Instant	1	$21.99
57	Wayfarer's Bauble	Artifact	1	$0.31
58	Roaming Throne	Creature	4	$47.06
59	Ashnod's Altar	Artifact	3	$8.15
60	Big Score	Instant	4	$0.41
61	War Room	Land	0	$0.79
62	Abrade	Instant	2	$0.17
63	Talisman of Conviction	Artifact	2	$0.35
64	Herald's Horn	Artifact	3	$2.88
65	Mana Vault	Artifact	1	$91.59
66	Chrome Mox	Artifact	0	$51.19
67	Lightning Bolt	Instant	1	$0.75
68	Ghostly Prison	Enchantment	3	$5.72
69	Nykthos, Shrine to Nyx	Land	0	$45.68
70	Reflecting Pool	Land	0	$5.50
71	Spectator Seating	Land	0	$5.71
72	Austere Command	Sorcery	6	$0.33
73	Flawless Maneuver	Instant	3	$9.24
74	Farewell	Sorcery	6	$4.44
75	Three Tree City	Land	0	$29.09
76	Gemstone Caverns	Land	0	$62.05
77	Boros Charm	Instant	2	$4.50
78	Command Beacon	Land	0	$7.99
79	Akroma's Will	Instant	4	$16.21
80	Idol of Oblivion	Artifact	2	$2.40
81	Prismatic Vista	Land	0	$28.10
82	Buried Ruin	Land	0	$0.38
83	Thran Dynamo	Artifact	4	$1.94
84	Storm-Kiln Artist	Creature	4	$1.74
85	Stroke of Midnight	Instant	3	$0.20
86	Impact Tremors	Enchantment	2	$2.52
87	Patchwork Banner	Artifact	3	$1.52
88	Mox Amber	Artifact	0	$86.45
89	Karn's Bastion	Land	0	$2.51
90	Professional Face-Breaker	Creature	3	$4.99
91	Ash Barrens	Land	0	$0.15
92	Thrill of Possibility	Instant	2	$0.17
93	Secluded Courtyard	Land	0	$0.31
94	Ornithopter of Paradise	Creature	2	$0.35
95	Sensei's Divining Top	Artifact	1	$36.48
96	Sword of the Animist	Artifact	2	$2.79
97	Mithril Coat	Artifact	3	$27.09
98	Gamble	Sorcery	1	$16.21
99	Mox Opal	Artifact	0	$229.58
100	Unclaimed Territory	Land	0	$0.30

Curve of these staples

Combos with Ertha Jo, Frontier Mentor

The 10 most popular of 18 combos (by EDHREC decklist count) using this commander that fit its color identity, from Commander Spellbook.

Ertha Jo, Frontier Mentor + The Jolly Balloon Man + Zealous Conscripts
Infinite creature LTB · Infinite creature ETB · Infinite creature sacrifice triggers · Infinite death triggers · Infinite creature tokens with haste
How it works on Commander Spellbook
Build around this combo
Ertha Jo, Frontier Mentor + Restoration Angel + The Jolly Balloon Man
Infinite creature LTB · Infinite creature ETB · Infinite creature sacrifice triggers · Infinite death triggers · Infinite creature tokens with haste
How it works on Commander Spellbook
Build around this combo
Ertha Jo, Frontier Mentor + Felidar Guardian + The Jolly Balloon Man
Infinite creature LTB · Infinite creature ETB · Infinite creature sacrifice triggers · Infinite death triggers · Infinite creature tokens with haste
How it works on Commander Spellbook
Build around this combo
Ertha Jo, Frontier Mentor + Sparring Mummy + The Jolly Balloon Man
Infinite creature LTB · Infinite creature ETB · Infinite creature sacrifice triggers · Infinite death triggers · Infinite creature tokens with haste
How it works on Commander Spellbook
Build around this combo
Ertha Jo, Frontier Mentor + Icewind Stalwart + The Jolly Balloon Man
Infinite creature LTB · Infinite creature ETB · Infinite creature sacrifice triggers · Infinite death triggers · Infinite creature tokens with haste
How it works on Commander Spellbook
Build around this combo
Ertha Jo, Frontier Mentor + The Jolly Balloon Man + Wispweaver Angel
Infinite creature LTB · Infinite creature ETB · Infinite creature sacrifice triggers · Infinite death triggers · Infinite creature tokens with haste
How it works on Commander Spellbook
Build around this combo
Clock of Omens + Ertha Jo, Frontier Mentor + Liquimetal Torque + Creature That Triggers on Being Tapped
Infinite triggers from the creature with a tap trigger
How it works on Commander Spellbook
Build around this combo
Ertha Jo, Frontier Mentor + Palladium Myr + Voltaic Key
Infinite colorless mana · Infinite untap of artifact creatures you control · Infinite mana artifact creatures you control can produce
How it works on Commander Spellbook
Build around this combo
Clock of Omens + Ertha Jo, Frontier Mentor + Liquimetal Coating + Creature That Triggers on Being Tapped
Infinite triggers from the creature with a tap trigger
How it works on Commander Spellbook
Build around this combo
Clock of Omens + Ertha Jo, Frontier Mentor + Transmutation Font
Infinite tapped Food tokens · Infinite tapped Clue tokens · Infinite tapped Blood tokens
How it works on Commander Spellbook
Build around this combo

Card data and images courtesy of Scryfall; popularity ranking from EDHREC decklist data included in Scryfall bulk. Combo data courtesy of Commander Spellbook. Deckwarden is unofficial Fan Content and is not endorsed by Wizards of the Coast.

Commanders