Bone Devourer

a Dragon attacks — 474 cards in the game can cause this (Bone Devourer is one).

When Bone Devourer attacks:

1. Silumgar, the Drifting Death — shrinks a creature by -1/-1
2. Utvara Hellkite — makes a token
3. The Ur-Dragon — draws you that many cards
4. Atarka, World Render — grants double strike
5. Kolaghan, the Storm's Fury — gives +1/+0
6. Invasion of Tarkir // Defiant Thundermaw — deals 2 damage
7. Ojutai, Soul of Winter — taps a creature, artifact, enchantment, planeswalker or battle an opponent controls
8. Dromoka, the Eternal — puts a counter on a permanent

a Dragon deals combat damage — 474 cards in the game can cause this (Bone Devourer is one).

When Bone Devourer deals combat damage:

1. Parapet Thrasher — triggers
2. Broodcaller Scourge — puts a permanent onto the battlefield
3. Zurgo and Ojutai — triggers

a nontoken Dragon enters the battlefield — 484 cards in the game can cause this (Bone Devourer is one).

When Bone Devourer enters:

1. Lathliss, Dragon Queen — makes a token
2. Miirym, Sentinel Wyrm — makes a token

a Dragon enters the battlefield — 524 cards in the game can cause this (Bone Devourer is one).

When Bone Devourer enters:

1. Dragon Tempest — deals damage
2. Bloomvine Regent // Claim Territory — gains you 3 life
3. Sarkhan, Dragon Ascendant — puts a +1/+1 counter on itself
4. Ganax, Astral Hunter — makes a token
5. Scourge of Valkas — deals damage
6. Bladewing's Thrall — returns itself from the graveyard
7. Sarkhan, Soul Aflame — copies a permanent
8. Teeming Dragonstorm — triggers
9. Corroding Dragonstorm — triggers
10. Roiling Dragonstorm — triggers

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

a creature gets a counter — 2,691 cards in the game can cause this (Bone Devourer is one).

When Bone Devourer gets a counter:

1. Hollowmurk Siege — draws you 1 card
2. Ant-Man, Colony Commander — makes a token
3. Earth Kingdom General — gains you that much life
4. Casey Jones, Back Alley Brute — deals that much damage
5. Generous Patron — draws you 1 card
6. Shalai and Hallar — deals that much damage
7. Danny Pink — draws you 1 card
8. Enduring Scalelord — puts a +1/+1 counter on itself
9. Bold Plagiarist — puts counters on a permanent
10. Mikey & Leo, Chaos & Order — draws you 1 card

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

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

When Bone Devourer makes a player lose life:

1. The Master of Lake-town — mills a card
2. Intermediate Chirography — puts a counter on a creature
3. Vilis, Broker of Blood — draws you that many cards
4. Vengeful Warchief — puts a +1/+1 counter on itself
5. Wax-Wane Witness — gets +1/+0
6. Oath of Lim-Dûl — sacrifices an enchantment
7. Marina Vendrell's Grimoire — triggers
8. Lich's Mastery — triggers
9. Lich's Tomb — sacrifices a permanent
10. Gonti's Machinations — puts a counter on a permanent you control

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

a card is drawn — 3,815 cards in the game can cause this (Bone Devourer is one).

When Bone Devourer makes a player draw a card:

1. Aether Syphon — mills a card
2. Temmet, Naktamun's Will — gives +1/+1
3. Niv-Mizzet, Parun — deals 1 damage
4. The Locust God — makes a token
5. Starving Revenant — makes each opponent lose 1 life
6. Diviner's Wand — gets +1/+1
7. Ominous Seas — puts a foreshadow counter on itself
8. Dream Trawler — gets +1/+0
9. Iron Man, Armored Avenger — puts a counter on a creature
10. The Astonishing Ant-Man — puts a +1/+1 counter on itself

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

anything gets a counter — 4,415 cards in the game can cause this (Bone Devourer is one).

1. All Will Be One — When Bone Devourer gets a counter, All Will Be One deals that much damage

8 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 (Bone Devourer is one).

When Bone Devourer attacks:

1. Far Fortune, End Boss — deals 1 damage
2. Invisible Woman — triggers

124 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 (Bone Devourer is one).

When Bone Devourer enters:

1. Scurry Oak — puts a counter on itself
2. Fathom Mage — puts a counter on itself
3. Lonis, Genetics Expert — puts a counter on itself

312 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 (Bone Devourer is one).

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

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