Mockingbird

a Bard attacks — 130 cards in the game can cause this (Mockingbird is one).

1. Chong and Lily, Nomads — When Mockingbird attacks, Chong and Lily, Nomads triggers

a Bird attacks — 486 cards in the game can cause this (Mockingbird is one).

When Mockingbird attacks:

1. Hermes, Overseer of Elpis — scries
2. Choco, Seeker of Paradise — puts a land onto the battlefield

a Bird creature is cast — 486 cards in the game can cause this (Mockingbird is one).

1. Chocobo Camp — When Mockingbird is cast, it arrives with counters thanks to Chocobo Camp

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

a Bird deals combat damage — 486 cards in the game can cause this (Mockingbird is one).

1. Kastral, the Windcrested — When Mockingbird deals combat damage, Kastral, the Windcrested triggers

a nontoken Bird enters the battlefield — 487 cards in the game can cause this (Mockingbird is one).

1. Knightfisher — When Mockingbird enters, Knightfisher makes a token

a Bird enters the battlefield — 538 cards in the game can cause this (Mockingbird is one).

1. Salvation Swan — When Mockingbird enters, Salvation Swan flickers a creature you control

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

anything attacks — 17,934 cards in the game can cause this (Mockingbird is one).

When Mockingbird attacks:

1. Far Fortune, End Boss — deals 1 damage
2. Temmet, Naktamun's Will — draws you 1 card
3. Grim Javelineer — gives +1/+0
4. Invisible Woman — triggers
5. Caesar, Legion's Emperor — sacrifices a creature
6. Guide of Souls — triggers
7. Campsite Cuisine — sacrifices a Food
8. Gossip's Talent — triggers
9. Banon, the Returners' Leader — draws and discards
10. Toph, Earthbending Master — puts a counter on a permanent

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

a creature attacks — 17,934 cards in the game can cause this (Mockingbird is one).

When Mockingbird attacks:

1. Adaptive Omnitool — searches a library
2. Anthem of Rakdos — gives +2/+0
3. Kindred Discovery — draws you 1 card
4. Invasion of New Capenna // Holy Frazzle-Cannon — puts counters on a permanent
5. Chorale of the Void — brings a card back
6. Anim Pakal, Thousandth Moon — puts a +1/+1 counter on itself
7. Saw — sacrifices a creature
8. Gisa's Favorite Shovel — makes an opponent sacrifice a creature
9. Ultima Weapon — kills a creature an opponent controls
10. Total War — kills a creature

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

a creature blocks — 17,934 cards in the game can cause this (Mockingbird is one).

When Mockingbird blocks:

1. Mage Hunters' Onslaught — makes a player lose 1 life
2. Carnage Gladiator — makes a player lose 1 life
3. Barrow-Blade — strips abilities
4. Heat of Battle — deals 1 damage
5. Battle Strain — deals 1 damage
6. Favor of the Woods — gains you 3 life
7. Tide of War — sacrifices a creature
8. Dead-Iron Sledge — kills a creature
9. Dwindle — kills a creature
10. Shield of the Righteous — triggers

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

a nontoken creature attacks — 17,934 cards in the game can cause this (Mockingbird is one).

When Mockingbird attacks:

1. Mardu Ascendancy — makes a token
2. Basri Ket — makes a token
3. Militia's Pride — makes a token

a creature enters the battlefield — 19,800 cards in the game can cause this (Mockingbird is one).

1. Fire Nation Salvagers — When Fire Nation Salvagers enters because Mockingbird copies it, its ability triggers again
2. Goblin Goliath — When Goblin Goliath enters because Mockingbird copies it, its ability triggers again
3. Slash, Reptile Rampager — When Mockingbird enters, Slash, Reptile Rampager deals 2 damage
4. Ray Fillet, Wave Warrior — When Mockingbird enters, Ray Fillet, Wave Warrior puts a counter on itself
5. Bess, Soul Nourisher — When Mockingbird enters, Bess, Soul Nourisher puts a +1/+1 counter on itself
6. The Neutrinos — When Mockingbird enters, The Neutrinos gets +1/+0
7. Wingnut, Bat on the Belfry — When Mockingbird enters, Wingnut, Bat on the Belfry grants flying, haste and menace
8. Aetherstorm Roc — When Aetherstorm Roc enters because Mockingbird copies it, its ability triggers again
9. Raphael, Most Attitude — When Mockingbird enters, Raphael, Most Attitude exiles a card from your library
10. Clandestine Meddler — When Clandestine Meddler enters because Mockingbird copies it, its ability triggers again

296 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 (Mockingbird is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When Mockingbird enters, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself
2. Ivora, Insatiable Heir — When Ivora, Insatiable Heir enters because Mockingbird copies it, its ability triggers again
3. Dogmeat, Ever Loyal — When Dogmeat, Ever Loyal enters because Mockingbird copies it, its ability triggers again
4. The Earth King — When The Earth King enters because Mockingbird copies it, its ability triggers again
5. SP//dr, Piloted by Peni — When SP//dr, Piloted by Peni enters because Mockingbird copies it, its ability triggers again
6. Mu Yanling, Wind Rider — When Mu Yanling, Wind Rider enters because Mockingbird copies it, its ability triggers again
7. The Rani — When The Rani enters because Mockingbird copies it, its ability triggers again
8. Ellivere of the Wild Court — When Ellivere of the Wild Court enters because Mockingbird copies it, its ability triggers again
9. J. Jonah Jameson — When J. Jonah Jameson enters because Mockingbird copies it, its ability triggers again
10. Ultimecia, Temporal Threat — When Ultimecia, Temporal Threat enters because Mockingbird copies it, its ability triggers again

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