Runaway Boulder

an artifact is discarded — 46 cards in the game can cause this (Runaway Boulder is one).

When Runaway Boulder makes a player discard a card:

1. Urza, Powerstone Prodigy — makes a token
2. Mishra, Excavation Prodigy — adds 2 mana
3. Bone Miser — draws you 1 card
4. Oskar, Rubbish Reclaimer — brings a card back
5. Conspiracy Theorist — brings a card back
6. Veronica, Dissident Scribe — makes a token
7. Green Goblin, Nemesis — puts a counter on a Goblin
8. Surly Badgersaur — deals damage

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

an artifact goes to a graveyard — 1,250 cards in the game can cause this (Runaway Boulder is one).

When Runaway Boulder hits the graveyard:

1. Ultron the Annihilator — makes each opponent lose 1 life
2. Ultron's Auxiliary — puts a +1/+1 counter on itself

a card is discarded — 2,042 cards in the game can cause this (Runaway Boulder is one).

When Runaway Boulder makes a player discard a card:

1. Ivora, Insatiable Heir — puts a +1/+1 counter on itself
2. Cool but Rude — deals 2 damage
3. Containment Construct — brings a card back
4. Moonstone, Harsh Mistress — brings a card back
5. Lazotep Chancellor — puts 2 counters on a Zombie or Army
6. Magmakin Artillerist — deals that much damage
7. Inti, Seneschal of the Sun — exiles a card from your library
8. Pitchstone Wall — sacrifices itself
9. Currency Converter — exiles it
10. Hostile Investigator — triggers

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

anything deals noncombat damage — 3,068 cards in the game can cause this (Runaway Boulder is one).

When Runaway Boulder 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. Niv-Mizzet, Visionary — draws you that many cards
5. Dragonborn Champion — draws you 1 card
6. Chandra's Incinerator — deals that much damage
7. Chandra's Pyreling — gets +1/+0
8. Talon of Pain — puts a charge counter on itself
9. Thor, Guardian of Midgard — exiles a card from your library
10. Virtue of Courage // Embereth Blaze — exiles a card from your library

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

an artifact is cast — 3,683 cards in the game can cause this (Runaway Boulder is one).

When Runaway Boulder is cast:

1. Tomik, Izzet Sparkmage — gets +1/+1
2. Mendicant Core, Guidelight — copies a spell
3. Sai, Master Thopterist — makes a token
4. Ravenous Robots — makes a token
5. Pinnacle Emissary — makes a token
6. Mirrodin Besieged — makes a token
7. Poetic Ingenuity — makes a token
8. Digsite Engineer — makes a token
9. Artist's Talent — draws and discards
10. Dr. Madison Li — puts a counter on a permanent you control

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

a nontoken artifact enters the battlefield — 3,768 cards in the game can cause this (Runaway Boulder is one).

When Runaway Boulder enters:

1. Ultron, Artificial Malevolence — makes a token
2. The Prydwen, Steel Flagship — makes a token
3. Conquest Mission — puts a quest counter on itself
4. Surge Conductor — proliferates
5. Replication Specialist — makes a token
6. Weapons Manufacturing — makes a token
7. Mirrorworks — makes a token

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

When Runaway Boulder makes a player draw a card:

1. Temmet, Naktamun's Will — gives +1/+1
2. Niv-Mizzet, Parun — deals 1 damage
3. Aether Syphon — mills a card
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.

an artifact enters the battlefield — 4,643 cards in the game can cause this (Runaway Boulder is one).

1. Transplant Theorist — When Runaway Boulder enters, Transplant Theorist draws you 1 card

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

a card in a graveyard — 7,589 cards in the game can cause this (Runaway Boulder is one).

1. Charnelhoard Wurm — When Runaway Boulder is in the graveyard, Charnelhoard Wurm can bring it back

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

a creature is dealt damage — 18,923 cards in the game can cause this (Runaway Boulder is one).

1. Soul Link — When a creature is dealt damage thanks to Runaway Boulder, Soul Link gains you that much life

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