Fear of Impostors

a Nightmare enters the battlefield — 151 cards in the game can cause this (Fear of Impostors is one).

1. Umbris, Fear Manifest — When Fear of Impostors enters, Umbris, Fear Manifest exiles a card from an opponent's library

a card is milled — 772 cards in the game can cause this (Fear of Impostors is one).

1. Lo and Li, Royal Advisors — When Fear of Impostors makes a player mill a card, Lo and Li, Royal Advisors puts a counter on an Advisor

an enchantment is cast — 3,673 cards in the game can cause this (Fear of Impostors is one).

When Fear of Impostors is cast:

1. Hallowed Haunting — makes a token
2. Daxos the Returned — puts a counter on a permanent
3. Tatsunari, Toad Rider — makes a token
4. Sythis, Harvest's Hand — gains you 1 life
5. Sigil of the Empty Throne — makes a token
6. Dawnhart Geist — gains you 2 life
7. Herald of the Pantheon — gains you 1 life
8. Kami of Transience — puts a +1/+1 counter on itself
9. Argothian Enchantress — draws you 1 card
10. Mesa Enchantress — draws you 1 card

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

a nontoken enchantment enters the battlefield — 3,691 cards in the game can cause this (Fear of Impostors is one).

1. Historian's Boon — When Fear of Impostors enters, Historian's Boon makes a token

an enchantment enters the battlefield — 3,743 cards in the game can cause this (Fear of Impostors is one).

When Fear of Impostors enters:

1. Calix, Guided by Fate — puts a counter on a creature
2. Elvish Archivist — draws you 1 card
3. Victor, Valgavoth's Seneschal — surveils
4. Strength from the Fallen — gives +X/+X, where X is the number of creature cards in your graveyard
5. Doomwake Giant — shrinks a creature by -1/-1
6. Cacophony Unleashed — turns something into a creature
7. Ghostly Dancers — makes a token
8. Thassa's Devourer — mills a card
9. Killian, Decisive Mentor — taps a creature
10. Thoughtrender Lamia — makes an opponent discard a card

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

a card in a graveyard — 7,589 cards in the game can cause this (Fear of Impostors is one).

1. Thor, God of Thunder — Fear of Impostors puts cards into the graveyard that Thor, God of Thunder can bring back
2. Hedonist's Trove — Fear of Impostors puts cards into the graveyard that Hedonist's Trove can bring back
3. Samwise Gamgee — Fear of Impostors puts cards into the graveyard that Samwise Gamgee can bring back
4. Fire Nation Salvagers — Fear of Impostors puts cards into the graveyard that Fire Nation Salvagers can bring back
5. Bloodbond March — Fear of Impostors puts cards into the graveyard that Bloodbond March can bring back
6. Gale, Waterdeep Prodigy — Fear of Impostors puts cards into the graveyard that Gale, Waterdeep Prodigy can bring back
7. Harness the Storm — Fear of Impostors puts cards into the graveyard that Harness the Storm can bring back
8. Transplant Theorist — Fear of Impostors puts cards into the graveyard that Transplant Theorist can bring back
9. Heart-Shaped Herb — Fear of Impostors puts cards into the graveyard that Heart-Shaped Herb can bring back
10. Sidequest: Card Collection // Magicked Card — Fear of Impostors fills your graveyard toward the 8 or more cards Sidequest: Card Collection // Magicked Card needs

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

anything goes to a graveyard — 7,589 cards in the game can cause this (Fear of Impostors is one).

When a card hits the graveyard thanks to Fear of Impostors:

1. The Haunt of Hightower — puts a +1/+1 counter on itself
2. Duskmantle Guildmage — makes each opponent lose 1 life
3. Vulturous Zombie — puts a +1/+1 counter on itself
4. Quest for Ancient Secrets — puts a quest counter on itself
5. Bloodchief Ascension — makes each opponent lose 2 life
6. Compost — draws you 1 card
7. Planar Void — hits a graveyard
8. Measure of Wickedness — gives an opponent control of itself
9. Energy Field — sacrifices itself

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

anything attacks — 17,934 cards in the game can cause this (Fear of Impostors is one).

When Fear of Impostors attacks:

1. Within Range — makes each opponent lose life
2. Sparring Regimen — puts a counter on a creature
3. Campsite Cuisine — sacrifices a Food
4. Obsessive Pursuit — makes you lose life

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

a creature is cast — 18,010 cards in the game can cause this (Fear of Impostors is one).

When Fear of Impostors is cast:

1. Primeval Bounty — makes a token
2. Communal Brewing — it arrives with counters thanks to Communal Brewing

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

a creature enters the battlefield — 19,800 cards in the game can cause this (Fear of Impostors is one).

When Fear of Impostors enters:

1. Pollywog Prodigy — puts a counter on itself
2. Airbender Ascension — puts a quest counter on itself

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

anything enters the battlefield — 26,499 cards in the game can cause this (Fear of Impostors is one).

1. The Immortal Weapons — When The Immortal Weapons enters thanks to Fear of Impostors, it brings a card back
2. Thancred Waters — When Thancred Waters enters thanks to Fear of Impostors, it grants indestructible
3. Hraesvelgr of the First Brood — When Hraesvelgr of the First Brood enters thanks to Fear of Impostors, it gives +1/+0
4. The Reaper, King No More — When The Reaper, King No More enters thanks to Fear of Impostors, it puts a counter on a creature
5. Rosheen, Roaring Prophet — When Rosheen, Roaring Prophet enters thanks to Fear of Impostors, it mills a card
6. Variable Chaser // Arc of Fortune — When Variable Chaser // Arc of Fortune enters thanks to Fear of Impostors, it becomes prepared
7. Pompous Battlemage // Improvised Act — When Pompous Battlemage // Improvised Act enters thanks to Fear of Impostors, it becomes prepared
8. Pyre Rhymer // Molten Tide — When Pyre Rhymer // Molten Tide enters thanks to Fear of Impostors, it becomes prepared
9. Ty Lee, Chi Blocker — When Ty Lee, Chi Blocker enters thanks to Fear of Impostors, it taps a creature
10. Meathook Massacre II — When Meathook Massacre II enters thanks to Fear of Impostors, it makes a player sacrifice a creature

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