Ertha Jo, Frontier Mentor

provide a creature to sacrifice — 1,060 cards in Ertha Jo's colors can cause this.

1. Industrial Advancement — Ertha Jo, Frontier Mentor makes fodder for Industrial Advancement
2. Divergent Transformations — Ertha Jo, Frontier Mentor makes fodder for Divergent Transformations
3. Transmogrify — Ertha Jo, Frontier Mentor makes fodder for Transmogrify

1,057 other cards cause it too. These are the ones with the most connections.

a creature token enters the battlefield — 1,095 cards in Ertha Jo's colors can cause this (Ertha Jo is one).

When a Mercenary enters thanks to Ertha Jo, Frontier Mentor:

1. Securitron Squadron — puts a counter on a permanent
2. Anointer Priest — gains you 1 life
3. Nesting Dovehawk — puts a +1/+1 counter on itself

a creature token is created — 1,095 cards in Ertha Jo's colors can cause this (Ertha Jo is one).

1. Staff of the Storyteller — When Ertha Jo, Frontier Mentor makes a Mercenary token, Staff of the Storyteller puts a story counter on itself

2 other cards care about it too. These are the ones with the most connections.

a token enters the battlefield — 1,460 cards in Ertha Jo's colors can cause this (Ertha Jo is one).

When a Mercenary enters thanks to Ertha Jo, Frontier Mentor:

1. Belladonna Took — gains you 1 life
2. Lucy MacLean, Positively Armed — makes a token
3. Caretaker's Talent — draws you 1 card
4. Spiritcall Enthusiast // Scrollboost — becomes prepared

a token is created — 1,461 cards in Ertha Jo's colors can cause this (Ertha Jo is one).

When Ertha Jo, Frontier Mentor makes a Mercenary token:

1. Idol of Oblivion — draws you 1 card
2. Rosie Cotton of South Lane — puts a counter on a permanent

5 other cards care about it too. These are the ones with the most connections.

a creature attacks — 6,550 cards in Ertha Jo's colors can cause this (Ertha Jo is one).

When Ertha Jo, Frontier Mentor attacks:

1. Adaptive Omnitool — searches a library
2. Anim Pakal, Thousandth Moon — puts a +1/+1 counter on itself
3. Staff of Titania — makes a token
4. Glory Bearers — gives +0/+1
5. Saw — sacrifices a creature
6. Ultima Weapon — kills a creature an opponent controls
7. Total War — kills a creature
8. The Spear of Leonidas — triggers
9. Super-Soldier Serum — triggers
10. Norin the Wary — flickers itself

102 other cards care about it too. These are the ones with the most connections.

anything attacks — 6,550 cards in Ertha Jo's colors can cause this (Ertha Jo is one).

When Ertha Jo, Frontier Mentor attacks:

1. ED-E, Lonesome Eyebot — puts a quest counter on itself
2. Surgical Suite // Hospital Room — puts a counter on a creature
3. Apothecary White — makes a token
4. Guide of Souls — triggers
5. Banon, the Returners' Leader — draws and discards
6. Three Dog, Galaxy News DJ — sacrifices an Aura
7. Inti, Seneschal of the Sun — triggers
8. Gut, True Soul Zealot — sacrifices a creature or artifact
9. Cool but Rude — draws and discards
10. Swashbuckler Extraordinaire — sacrifices a Treasure

52 other cards care about it too. These are the ones with the most connections.

a creature blocks — 6,550 cards in Ertha Jo's colors can cause this (Ertha Jo is one).

When Ertha Jo, Frontier Mentor blocks:

1. Barrow-Blade — strips abilities
2. Heat of Battle — deals 1 damage
3. Battle Strain — deals 1 damage
4. Noble Stand — gains you 2 life
5. Battle Cry — gives +0/+1
6. Tide of War — sacrifices a creature
7. Dead-Iron Sledge — kills a creature

5 other cards care about it too. These are the ones with the most connections.

a nontoken creature attacks — 6,550 cards in Ertha Jo's colors can cause this (Ertha Jo is one).

When Ertha Jo, Frontier Mentor attacks:

1. Basri Ket — makes a token
2. Militia's Pride — makes a token

a creature deals combat damage — 6,550 cards in Ertha Jo's colors can cause this (Ertha Jo is one).

1. Antagonist Incorporator — When Ertha Jo, Frontier Mentor deals combat damage, Antagonist Incorporator makes a token

73 other cards care about it too. These are the ones with the most connections.

a creature is cast — 6,572 cards in Ertha Jo's colors can cause this (Ertha Jo is one).

When Ertha Jo, Frontier Mentor is cast:

1. Summon: Brynhildr — grants haste
2. God-Eternal Oketra — makes a token
3. Oketra's Monument — makes a token
4. Quest for the Holy Relic — puts a quest counter on itself
5. Bontu's Monument — makes each opponent lose 1 life
6. Vanquisher's Banner — draws you 1 card
7. Oltec Matterweaver — triggers
8. Pure Reflection — kills a Reflection
9. Flickering Hound — flickers a creature you control
10. Hazoret's Monument — draws and discards

18 other cards care about it too. These are the ones with the most connections.

a nontoken creature enters the battlefield — 6,715 cards in Ertha Jo's colors can cause this (Ertha Jo is one).

When Ertha Jo, Frontier Mentor enters:

1. Angelic Sell-Sword — makes a token
2. Saradoc, Master of Buckland — makes a token
3. Radiant Solar — triggers

9 other cards care about it too. These are the ones with the most connections.

a creature enters the battlefield — 7,303 cards in Ertha Jo's colors can cause this (Ertha Jo is one).

1. Slash, Reptile Rampager — When a Mercenary enters thanks to Ertha Jo, Frontier Mentor, Slash, Reptile Rampager deals 2 damage
2. Gimli of the Glittering Caves — When Ertha Jo, Frontier Mentor enters, Gimli of the Glittering Caves puts counters on a permanent
3. The Neutrinos — When a Mercenary enters thanks to Ertha Jo, Frontier Mentor, The Neutrinos gets +1/+0
4. Wingnut, Bat on the Belfry — When a Mercenary enters thanks to Ertha Jo, Frontier Mentor, Wingnut, Bat on the Belfry grants flying, haste and menace
5. Aetherstorm Roc — When a Mercenary enters thanks to Ertha Jo, Frontier Mentor, Aetherstorm Roc puts a counter on a permanent you control
6. Raphael, Most Attitude — When a Mercenary enters thanks to Ertha Jo, Frontier Mentor, Raphael, Most Attitude exiles a card from your library

141 other cards care about it too. These are the ones with the most connections.

anything enters the battlefield — 10,759 cards in Ertha Jo's colors can cause this.

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When a Mercenary enters thanks to Ertha Jo, Frontier Mentor, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself
2. Aether Vial — When Ertha Jo, Frontier Mentor enters thanks to Aether Vial, it makes a token
3. Mercadian Lift — When Ertha Jo, Frontier Mentor enters thanks to Mercadian Lift, it makes a token
4. Belbe's Portal — When Ertha Jo, Frontier Mentor enters thanks to Belbe's Portal, it makes a token
5. Dragon Arch — When Ertha Jo, Frontier Mentor enters thanks to Dragon Arch, it makes a token
6. Quicksilver Amulet — When Ertha Jo, Frontier Mentor enters thanks to Quicksilver Amulet, it makes a token
7. Helvault — When Ertha Jo, Frontier Mentor enters thanks to Helvault, it makes a token
8. Tawnos's Coffin — When Ertha Jo, Frontier Mentor enters thanks to Tawnos's Coffin, it makes a token
9. Planar Bridge — When Ertha Jo, Frontier Mentor enters thanks to Planar Bridge, it makes a token
10. Thran Temporal Gateway — When Ertha Jo, Frontier Mentor enters thanks to Thran Temporal Gateway, it makes a token
11. Lantern of Revealing — When Ertha Jo, Frontier Mentor enters thanks to Lantern of Revealing, it makes a token

20 other cards care about it too. These are the ones with the most connections.