Ancient Cellarspawn

a spell is cast — 155 cards in the game can cause this (Ancient Cellarspawn is one).

1. Glaring Fleshraker — When Ancient Cellarspawn is cast, Glaring Fleshraker makes a token
2. The Kingpin of Crime — When Ancient Cellarspawn is cast, The Kingpin of Crime drains each opponent
3. Leader's Talent — When Ancient Cellarspawn is cast, Leader's Talent puts a counter on a creature
4. Sauron, Lord of the Rings — When Sauron, Lord of the Rings is cast thanks to Ancient Cellarspawn, it puts 5 counters on an Orc or Army
5. Nita, Forum Conciliator — When Ancient Cellarspawn is cast, Nita, Forum Conciliator puts a counter on a creature
6. Treasury Thrull — When Ancient Cellarspawn is cast, Treasury Thrull drains each opponent
7. Old Stickfingers — When Old Stickfingers is cast thanks to Ancient Cellarspawn, it mills a card
8. Life Insurance — When Ancient Cellarspawn is cast, Life Insurance drains each opponent
9. Norin the Wary — When Ancient Cellarspawn is cast, Norin the Wary flickers itself
10. Hunting Grounds — When Ancient Cellarspawn is cast, Hunting Grounds puts a creature onto the battlefield

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

a Horror deals combat damage — 382 cards in the game can cause this (Ancient Cellarspawn is one).

1. Captain N'ghathrod — When Ancient Cellarspawn deals combat damage, Captain N'ghathrod mills a card

life is lost — 3,160 cards in the game can cause this (Ancient Cellarspawn is one).

When a permanent makes a player lose life thanks to Ancient Cellarspawn:

1. Far Fortune, End Boss — raises your speed
2. Zahur, Glory's Past — raises your speed
3. Mendicant Core, Guidelight — raises your speed
4. Aether Syphon — raises your speed
5. Vnwxt, Verbose Host — raises your speed
6. Embalmed Ascendant — raises your speed
7. Slick Imitator — raises your speed
8. Nesting Bot — raises your speed
9. Howlsquad Heavy — raises your speed
10. Hour of Victory — raises your speed

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

an enchantment is cast — 3,673 cards in the game can cause this (Ancient Cellarspawn is one).

When Ancient Cellarspawn is cast:

1. Invasion of Regatha // Disciples of the Inferno — gets +1/+1
2. Hallowed Haunting — makes a token
3. Daxos the Returned — puts a counter on a permanent
4. Tatsunari, Toad Rider — makes a token
5. Sythis, Harvest's Hand — gains you 1 life
6. Sigil of the Empty Throne — makes a token
7. Dawnhart Geist — gains you 2 life
8. Herald of the Pantheon — gains you 1 life
9. Kami of Transience — puts a +1/+1 counter on itself
10. Argothian 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 (Ancient Cellarspawn is one).

1. Historian's Boon — When Ancient Cellarspawn enters, Historian's Boon makes a token

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

When Ancient Cellarspawn 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

79 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 (Ancient Cellarspawn is one).

When Ancient Cellarspawn attacks:

1. Within Range — makes each opponent lose life
2. Sparring Regimen — puts a counter on a creature
3. Temmet, Naktamun's Will — draws you 1 card
4. Campsite Cuisine — sacrifices a Food
5. Obsessive Pursuit — makes you lose life
6. Invisible Woman — triggers
7. Caesar, Legion's Emperor — sacrifices a creature
8. Guide of Souls — triggers

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

a creature attacks — 17,934 cards in the game can cause this (Ancient Cellarspawn is one).

When Ancient Cellarspawn attacks:

1. Adaptive Omnitool — searches a library
2. Saw — sacrifices a creature

220 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 (Ancient Cellarspawn is one).

1. Communal Brewing — When Ancient Cellarspawn is cast, it arrives with counters thanks to Communal Brewing

90 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 (Ancient Cellarspawn is one).

When Ancient Cellarspawn enters:

1. Season of Growth — scries
2. Airbender Ascension — puts a quest counter on itself
3. Slash, Reptile Rampager — deals 2 damage
4. Ray Fillet, Wave Warrior — puts a counter on itself
5. The Neutrinos — gets +1/+0
6. Aetherstorm Roc — puts a counter on a permanent you control

477 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 (Ancient Cellarspawn is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When Ancient Cellarspawn enters, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself

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