The Fifteenth Doctor

anything leaves a graveyard — 540 cards in The Fifteenth Doctor's colors can cause this (The Fifteenth Doctor is one).

When an artifact leaves a graveyard thanks to The Fifteenth Doctor:

1. Garrison Excavator — makes a token
2. Spirit of Resilience — puts a +1/+1 counter on itself
3. Fuming Effigy — deals 1 damage
4. Advanced Reconstruction — deals 2 damage

a card in a graveyard — 2,886 cards in The Fifteenth Doctor's colors can cause this (The Fifteenth Doctor is one).

The Fifteenth Doctor:

1. Thor, God of Thunder — puts cards into the graveyard that Thor, God of Thunder can bring back
2. Gale, Waterdeep Prodigy — puts cards into the graveyard that Gale, Waterdeep Prodigy can bring back
3. Harness the Storm — puts cards into the graveyard that Harness the Storm can bring back
4. Transplant Theorist — puts cards into the graveyard that Transplant Theorist can bring back
5. Heart-Shaped Herb — puts cards into the graveyard that Heart-Shaped Herb can bring back
6. Mindwhisker — fills your graveyard toward the 7 or more cards Mindwhisker needs
7. Pitchstone Wall — puts cards into the graveyard that Pitchstone Wall can bring back
8. Barkform Harvester — puts cards into the graveyard that Barkform Harvester can bring back
9. Cybernetic Specialist — puts cards into the graveyard that Cybernetic Specialist can bring back
10. Picklock Prankster // Free the Fae — puts cards into the graveyard that Picklock Prankster // Free the Fae can bring back

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

anything goes to a graveyard — 2,886 cards in The Fifteenth Doctor's colors can cause this (The Fifteenth Doctor is one).

When a card hits the graveyard thanks to The Fifteenth Doctor:

1. Quest for Ancient Secrets — puts a quest counter on itself
2. Energy Field — sacrifices itself

a creature attacks — 6,189 cards in The Fifteenth Doctor's colors can cause this (The Fifteenth Doctor is one).

When The Fifteenth Doctor attacks:

1. Adaptive Omnitool — searches a library
2. Kindred Discovery — draws you 1 card
3. Screaming Swarm — mills a card
4. Imperious Mindbreaker — mills a card
5. Staff of Titania — makes a token
6. Saw — sacrifices a creature
7. Ultima Weapon — kills a creature an opponent controls
8. Total War — kills a creature
9. The Spear of Leonidas — triggers
10. Norin the Wary — flickers itself

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

a creature blocks — 6,189 cards in The Fifteenth Doctor's colors can cause this (The Fifteenth Doctor is one).

When The Fifteenth Doctor blocks:

1. Barrow-Blade — strips abilities
2. Heat of Battle — deals 1 damage
3. Battle Strain — deals 1 damage
4. Tide of War — sacrifices a creature
5. Dead-Iron Sledge — kills a creature
6. Dwindle — kills a creature

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

anything attacks — 6,189 cards in The Fifteenth Doctor's colors can cause this (The Fifteenth Doctor is one).

When The Fifteenth Doctor attacks:

1. ED-E, Lonesome Eyebot — puts a quest counter on itself
2. Madame Web, Clairvoyant — mills a card
3. Shaun, Father of Synths — makes a token
4. Misty Mountains Raider — puts 2 counters on a Goblin or Army
5. Razorkin Hordecaller — makes a token
6. Gossip's Talent — triggers
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

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

a creature is cast — 6,218 cards in The Fifteenth Doctor's colors can cause this (The Fifteenth Doctor is one).

When The Fifteenth Doctor is cast:

1. Summon: Brynhildr — grants haste
2. Oketra's Monument — makes a token
3. Kozilek's Unsealing — makes 2 tokens
4. The Clone Saga — copies a spell
5. Customs Depot — draws you 1 card
6. Bontu's Monument — makes each opponent lose 1 life
7. Vanquisher's Banner — draws you 1 card
8. Hazoret's Monument — draws and discards
9. Aether Barrier — makes a player sacrifice a permanent
10. Kefnet's Monument — triggers

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

a nontoken creature enters the battlefield — 6,294 cards in The Fifteenth Doctor's colors can cause this (The Fifteenth Doctor is one).

When The Fifteenth Doctor enters:

1. Arni, Humble Scribe — untaps itself
2. Minion Reflector — makes a token
3. Molten Echoes — makes a token

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

a creature enters the battlefield — 6,749 cards in The Fifteenth Doctor's colors can cause this (The Fifteenth Doctor is one).

When The Fifteenth Doctor enters:

1. Slash, Reptile Rampager — deals 2 damage
2. Gimli of the Glittering Caves — puts counters on a permanent
3. Ray Fillet, Wave Warrior — puts a counter on itself
4. Wingnut, Bat on the Belfry — grants flying, haste and menace
5. Raphael, Most Attitude — exiles a card from your library

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

put anything onto the battlefield — 10,214 cards in The Fifteenth Doctor's colors can cause this.

When The Fifteenth Doctor enters:

1. Tempestra, Dame of Games — because Tempestra, Dame of Games copies it, its ability triggers again
2. Grimoire of the Dead — thanks to Grimoire of the Dead, it mills a card
3. Triassic Egg — thanks to Triassic Egg, it mills a card
4. Indomitable Creativity — thanks to Indomitable Creativity, it mills a card
5. Scrap Mastery — thanks to Scrap Mastery, it mills a card
6. Trickster's Talisman — because Trickster's Talisman copies it, its ability triggers again
7. Cold Storage — thanks to Cold Storage, it mills a card
8. Voyager Staff — thanks to Voyager Staff, it mills a card
9. Ghost Vacuum — thanks to Ghost Vacuum, it mills a card
10. Treasure Chest — thanks to Treasure Chest, it mills a card

10,204 other cards cause it too. These are the ones with the most connections.