Hollow One

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

When Hollow One makes a player discard a card:

1. Urza, Powerstone Prodigy — makes a token
2. Mishra, Excavation Prodigy — adds 2 mana
3. Oskar, Rubbish Reclaimer — brings a card back
4. Conspiracy Theorist — brings a card back
5. Veronica, Dissident Scribe — makes a token
6. Green Goblin, Nemesis — puts a counter on a Goblin

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

a creature is discarded — 206 cards in the game can cause this (Hollow One is one).

When Hollow One makes a player discard a card:

1. Bone Miser — makes a token
2. Surly Badgersaur — puts a +1/+1 counter on itself
3. Wharf Infiltrator — makes a token
4. Hashaton, Scarab's Fist — makes a token

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

an artifact attacks — 1,243 cards in the game can cause this (Hollow One is one).

When Hollow One attacks:

1. Alibou, Ancient Witness — deals X damage
2. Bio-Asset Allocator — makes each opponent lose 1 life
3. Assaultron Dominator — puts a counter on a permanent
4. Aloy, Savior of Meridian — triggers

an artifact deals combat damage — 1,243 cards in the game can cause this (Hollow One is one).

When Hollow One deals combat damage:

1. Locutus of Borg — makes a token
2. Sharding Sphinx — makes a token
3. Antagonist Incorporator — makes a token
4. Research Thief — draws you 1 card
5. Thopter Spy Network — draws you 1 card
6. Hive Mind Coprocessor — makes you lose life
7. Pia Nalaar, Chief Mechanic — puts a counter on a permanent you control
8. Automated Assembly Line — triggers

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

a nontoken artifact deals combat damage — 1,243 cards in the game can cause this (Hollow One is one).

1. Virulent Silencer — When Hollow One deals combat damage, Virulent Silencer puts 2 counters on a permanent

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

When Hollow One 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 (Hollow One is one).

When Hollow One 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.

a creature goes to a graveyard — 3,011 cards in the game can cause this (Hollow One is one).

When Hollow One hits the graveyard:

1. Syr Konrad, the Grim — deals 1 damage
2. Robot Domination — draws you 1 card
3. Voracious Brood — puts that many +1/+1 counters on itself
4. Dennick, Pious Apprentice // Dennick, Pious Apparition — triggers
5. Soulcipher Board // Cipherbound Spirit — triggers
6. Sefris of the Hidden Ways — triggers

8 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 (Hollow One is one).

When Hollow One is cast:

1. Mendicant Core, Guidelight — copies a spell
2. Sai, Master Thopterist — makes a token
3. Ravenous Robots — makes a token
4. Pinnacle Emissary — makes a token
5. Mirrodin Besieged — makes a token
6. Poetic Ingenuity — makes a token
7. Digsite Engineer — makes a token
8. Myrsmith — makes a token
9. Riddlesmith — draws you 1 card
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 (Hollow One is one).

When Hollow One 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 creature is cast — 18,010 cards in the game can cause this (Hollow One is one).

1. Primeval Bounty — When Hollow One is cast, Primeval Bounty makes a token

90 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 (Hollow One is one).

1. Pollywog Prodigy — When Hollow One enters, Pollywog Prodigy puts a counter on itself

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