Rex, Cyber-Hound

a Dog deals combat damage — 201 cards in the game can cause this (Rex is one).

1. Sophia, Dogged Detective — When Rex, Cyber-Hound deals combat damage, Sophia, Dogged Detective makes a token

a card is milled — 772 cards in the game can cause this (Rex is one).

1. Lo and Li, Royal Advisors — When Rex, Cyber-Hound makes a player mill a card, Lo and Li, Royal Advisors puts a counter on an Advisor

a creature is exiled — 1,003 cards in the game can cause this (Rex is one).

When a creature is exiled thanks to Rex, Cyber-Hound:

1. Ashnod's Intervention — brings a card back
2. Soulherder — puts a +1/+1 counter on itself

4 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 (Rex is one).

When Rex, Cyber-Hound 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 (Rex is one).

When Rex, Cyber-Hound 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 (Rex is one).

1. Virulent Silencer — When Rex, Cyber-Hound deals combat damage, Virulent Silencer puts 2 counters on a permanent

a creature leaves a graveyard — 1,302 cards in the game can cause this (Rex is one).

1. Erebos's Titan — When a creature leaves a graveyard thanks to Rex, Cyber-Hound, Erebos's Titan triggers

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

anything is exiled — 2,497 cards in the game can cause this (Rex is one).

1. The War Doctor — When a creature is exiled thanks to Rex, Cyber-Hound, The War Doctor puts a time counter on itself

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

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

When Rex, Cyber-Hound 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 (Rex is one).

When Rex, Cyber-Hound 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

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

When a permanent gets a counter thanks to Rex, Cyber-Hound:

1. Aether Revolt — deals that much damage
2. Territorial Gorger — gets +2/+2
3. Fabrication Module — puts a counter on a creature
4. All Will Be One — deals that much damage

5 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 (Rex is one).

When Rex, Cyber-Hound enters:

1. Transplant Theorist — draws you 1 card
2. Elvish Archivist — puts 2 +1/+1 counters on itself
3. Golbez, Crystal Collector — surveils
4. Sludge Strider — makes a player lose 1 life
5. Underhanded Designs — makes each opponent lose 1 life
6. Mechan Assembler — makes a token
7. Glassdust Hulk — gets +1/+1
8. Rook Turret — draws you 1 card
9. Hedron Detonator — deals 1 damage
10. Pactdoll Terror — makes each opponent lose 1 life

57 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 (Rex is one).

Rex, Cyber-Hound puts cards into the graveyard that:

1. Athreos, Shroud-Veiled — can bring back
2. Thor, God of Thunder — can bring back
3. Vessel of Endless Rest — can bring back
4. Samwise Gamgee — can bring back
5. Fire Nation Salvagers — can bring back
6. Bloodbond March — can bring back

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

a creature is cast — 18,010 cards in the game can cause this (Rex is one).

When Rex, Cyber-Hound is cast:

1. God-Eternal Oketra — makes a token
2. Primeval Bounty — makes a token

89 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 (Rex is one).

When Rex, Cyber-Hound enters:

1. Pollywog Prodigy — puts a counter on itself
2. Lonis, Genetics Expert — puts a counter on itself

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