The War Doctor

a permanent phases out — 3 cards in The War Doctor's colors can cause this.

1. Perch Protection — When a permanent phases out thanks to Perch Protection, The War Doctor puts a time counter on itself
2. The Pandorica — When a creature, artifact, enchantment, planeswalker or battle phases out thanks to The Pandorica, The War Doctor puts a time counter on itself
3. Teferi's Protection — When a permanent phases out thanks to Teferi's Protection, The War Doctor puts a time counter on itself

a nontoken creature is exiled — 489 cards in The War Doctor's colors can cause this (The War Doctor is one).

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

anything is exiled — 1,121 cards in The War Doctor's colors can cause this.

1. Sanctifier of Souls — When Sanctifier of Souls is exiled, The War Doctor puts a time counter on itself
2. Distinguished Conjurer — When a creature is exiled thanks to Distinguished Conjurer, The War Doctor puts a time counter on itself
3. Saltskitter — When Saltskitter is exiled, The War Doctor puts a time counter on itself
4. Portcullis — When a creature is exiled thanks to Portcullis, The War Doctor puts a time counter on itself
5. Airbender Ascension — When a creature is exiled thanks to Airbender Ascension, The War Doctor puts a time counter on itself
6. Summon: Brynhildr — When a permanent is exiled thanks to Summon: Brynhildr, The War Doctor puts a time counter on itself
7. Preston, the Vanisher — When a creature, artifact, enchantment, planeswalker or battle is exiled thanks to Preston, the Vanisher, The War Doctor puts a time counter on itself
8. Expedited Inheritance — When a permanent is exiled thanks to Expedited Inheritance, The War Doctor puts a time counter on itself
9. Thor, God of Thunder — When an Equipment is exiled thanks to Thor, God of Thunder, The War Doctor puts a time counter on itself
10. Professional Face-Breaker — When a permanent is exiled thanks to Professional Face-Breaker, The War Doctor puts a time counter on itself
11. God-Eternal Oketra — When God-Eternal Oketra is exiled thanks to The War Doctor, it triggers

1,085 other cards care about it too. These are the ones with the most connections.

anything deals noncombat damage — 2,055 cards in The War Doctor's colors can cause this (The War Doctor is one).

When The War Doctor deals noncombat damage:

1. Quest for Pure Flame — puts a quest counter on itself
2. Soul-Scar Mage — puts that many counters on a permanent
3. Fear of Burning Alive — deals that amount damage
4. Chandra's Incinerator — deals that much damage
5. Chandra's Pyreling — gets +1/+0
6. Talon of Pain — puts a charge counter on itself
7. Asgardian Inspiration — returns itself from the graveyard
8. Thor, Guardian of Midgard — exiles a card from your library
9. Virtue of Courage // Embereth Blaze — exiles a card from your library

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

life is lost — 1,372 cards in The War Doctor's colors can cause this (The War Doctor is one).

When The War Doctor makes a player lose life:

1. Nesting Bot — raises your speed
2. Howlsquad Heavy — raises your speed
3. Walking Sarcophagus — raises your speed
4. Starting Column — raises your speed
5. Racers' Scoreboard — raises your speed
6. Outpace Oblivion — raises your speed
7. Kickoff Celebrations — raises your speed
8. Goblin Surveyor — raises your speed
9. Mindcrank — mills a card
10. Lich's Tomb — sacrifices a permanent

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

a nontoken creature leaves the battlefield — 1,302 cards in The War Doctor's colors can cause this (The War Doctor is one).

1. Tokka & Rahzar, Unsupervised — When The War Doctor leaves the battlefield, Tokka & Rahzar, Unsupervised puts a +1/+1 counter on itself

a creature leaves the battlefield — 1,359 cards in The War Doctor's colors can cause this (The War Doctor is one).

When The War Doctor leaves the battlefield:

1. Lunarch Veteran // Luminous Phantom — gains you 1 life
2. Aang, Airbending Master — puts a counter on a permanent
3. Ninth Bridge Patrol — puts a +1/+1 counter on itself
4. Flaming Fist Officer — puts a +1/+1 counter on itself
5. Valor of the Worthy — makes a token
6. Outpost Siege — deals 1 damage

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

anything gets a counter — 1,512 cards in The War Doctor's colors can cause this (The War Doctor is one).

1. All Will Be One — When The War Doctor gets a counter, All Will Be One deals that much damage

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

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

When The War Doctor 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

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

anything attacks — 6,550 cards in The War Doctor's colors can cause this (The War Doctor is one).

When The War Doctor 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 The War Doctor's colors can cause this (The War Doctor is one).

When The War Doctor blocks:

1. Tide of War — sacrifices a creature
2. Dead-Iron Sledge — kills a creature

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

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

When The War Doctor attacks:

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

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

When The War Doctor enters:

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

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

anything enters the battlefield — 10,759 cards in The War Doctor's colors can cause this (The War Doctor is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When The War Doctor enters, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself

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