Celestial Gatekeeper

a permanent enters the battlefield — 152 cards in the game can cause this (Celestial Gatekeeper is one).

When Celestial Gatekeeper enters:

1. Dawn-Blessed Pennant — gains you 1 life
2. River Kelpie — draws you 1 card
3. Altar of the Brood — mills a card
4. Amareth, the Lustrous — searches a library
5. Rimefire Torque — puts a charge counter on itself
6. Eye of Singularity — kills a permanent

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

a Bird attacks — 486 cards in the game can cause this (Celestial Gatekeeper is one).

When Celestial Gatekeeper attacks:

1. Hermes, Overseer of Elpis — scries
2. Choco, Seeker of Paradise — puts a land onto the battlefield

a Bird creature is cast — 486 cards in the game can cause this (Celestial Gatekeeper is one).

1. Chocobo Camp — When Celestial Gatekeeper is cast, it arrives with counters thanks to Chocobo Camp

1 other card cares about it too. These are the ones with the most connections.

a Bird deals combat damage — 486 cards in the game can cause this (Celestial Gatekeeper is one).

1. Kastral, the Windcrested — When Celestial Gatekeeper deals combat damage, Kastral, the Windcrested triggers

a nontoken Bird enters the battlefield — 487 cards in the game can cause this (Celestial Gatekeeper is one).

1. Knightfisher — When Celestial Gatekeeper enters, Knightfisher makes a token

a Bird enters the battlefield — 538 cards in the game can cause this (Celestial Gatekeeper is one).

1. Salvation Swan — When Celestial Gatekeeper enters, Salvation Swan flickers a creature you control

1 other card cares about it too. These are the ones with the most connections.

a Cleric enters the battlefield — 722 cards in the game can cause this (Celestial Gatekeeper is one).

1. Cleric of Life's Bond — When Celestial Gatekeeper enters, Cleric of Life's Bond gains you 1 life

1 other card cares about it too. These are the ones with the most connections.

a nontoken creature is exiled — 995 cards in the game can cause this (Celestial Gatekeeper is one).

1. The War Games — When Celestial Gatekeeper is exiled, The War Games exiles a Warrior

a creature is exiled — 1,003 cards in the game can cause this (Celestial Gatekeeper is one).

When Celestial Gatekeeper is exiled:

1. Ashnod's Intervention — brings a card back
2. Syr Vondam, Sunstar Exemplar — puts a +1/+1 counter on itself
3. Kaya, Spirits' Justice — copies a permanent
4. Soulherder — puts a +1/+1 counter on itself
5. Kaya's Ghostform — blinks a permanent

1 other card cares about it too. These are the ones with the most connections.

anything is exiled — 2,497 cards in the game can cause this (Celestial Gatekeeper is one).

1. The War Doctor — When Celestial Gatekeeper is exiled, The War Doctor puts a time counter on itself

1 other card cares about it too. These are the ones with the most connections.

anything leaves a graveyard — 2,503 cards in the game can cause this (Celestial Gatekeeper is one).

When Celestial Gatekeeper leaves a graveyard:

1. Blastoneuron — makes each opponent lose 1 life
2. Defiled Crypt // Cadaver Lab — makes a token
3. Teval, the Balanced Scale — makes a token
4. Hologram Stalker — makes a token
5. Tormod, the Desecrator — makes a token
6. Quintorius, Field Historian — makes a token
7. Garrison Excavator — makes a token
8. Amzu, Swarm's Hunger — makes a token
9. Kirol, History Buff // Pack a Punch — becomes prepared
10. Teval's Judgment — triggers

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

a nontoken creature leaves the battlefield — 4,133 cards in the game can cause this (Celestial Gatekeeper is one).

When Celestial Gatekeeper leaves the battlefield:

1. Tokka & Rahzar, Unsupervised — puts a +1/+1 counter on itself
2. Splinter, the Mentor — makes a token
3. Rat King, Pale Piper — makes a token
4. Dual Nature — exiles a creature

a creature leaves the battlefield — 4,238 cards in the game can cause this (Celestial Gatekeeper is one).

When Celestial Gatekeeper leaves the battlefield:

1. Lunarch Veteran // Luminous Phantom — gains you 1 life
2. Extractor Demon — mills a card
3. Aang, Airbending Master — puts a counter on a permanent
4. Dour Port-Mage — draws you 1 card
5. Vela the Night-Clad — makes each opponent lose 1 life
6. Taeko, the Patient Avalanche — scries
7. Ninth Bridge Patrol — puts a +1/+1 counter on itself
8. Funeral March — makes a player sacrifice a creature
9. Sally Sparrow — triggers
10. Aang, at the Crossroads // Aang, Destined Savior — triggers

21 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 (Celestial Gatekeeper is one).

When Celestial Gatekeeper attacks:

1. Shaun, Father of Synths — makes a token
2. Far Fortune, End Boss — deals 1 damage
3. Temmet, Naktamun's Will — draws you 1 card
4. Invisible Woman — triggers
5. Caesar, Legion's Emperor — sacrifices a creature
6. Guide of Souls — triggers

119 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 (Celestial Gatekeeper is one).

When Celestial Gatekeeper attacks:

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

190 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 (Celestial Gatekeeper is one).

When Celestial Gatekeeper is cast:

1. God-Eternal Oketra — makes a token
2. Champions of the Perfect — draws you 1 card

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 (Celestial Gatekeeper is one).

When Celestial Gatekeeper enters:

1. Slash, Reptile Rampager — deals 2 damage
2. Ray Fillet, Wave Warrior — puts a counter on itself
3. The Neutrinos — gets +1/+0
4. Aetherstorm Roc — puts a counter on a permanent you control
5. Raphael, Most Attitude — exiles a card from your library

314 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 (Celestial Gatekeeper is one).

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

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