Watcher of the Roost

a creature is turned face up — 238 cards in the game can cause this (Watcher of the Roost is one).

When Watcher of the Roost is turned face up:

1. Printlifter Ooze — makes a token
2. Experiment Twelve — puts its power counters on a permanent
3. Pyrotechnic Performer — deals its power damage
4. Pine Walker — untaps a permanent
5. Fatal Mutation — kills it

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

When Watcher of the Roost 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 (Watcher of the Roost is one).

1. Chocobo Camp — When Watcher of the Roost 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 (Watcher of the Roost is one).

1. Kastral, the Windcrested — When Watcher of the Roost deals combat damage, Kastral, the Windcrested triggers

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

1. Knightfisher — When Watcher of the Roost enters, Knightfisher makes a token

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

1. Salvation Swan — When Watcher of the Roost enters, Salvation Swan flickers a creature you control

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

a Soldier creature enters the battlefield — 1,279 cards in the game can cause this (Watcher of the Roost is one).

1. Veteran's Armaments — When Watcher of the Roost enters, Veteran's Armaments triggers

life is gained — 2,076 cards in the game can cause this (Watcher of the Roost is one).

When Watcher of the Roost gains life:

1. Dina, Soul Steeper — makes each opponent lose 1 life
2. Marina Vendrell's Grimoire — draws you that many cards
3. South Wind Avatar — makes each opponent lose 1 life
4. Rodolf Duskbringer — grants indestructible
5. Fiendish Panda — puts a +1/+1 counter on itself
6. Veinwitch Coven — brings a card back
7. Cleric Class — puts a counter on a creature
8. Lich's Mastery — draws you that many cards
9. Wall of Limbs — puts a +1/+1 counter on itself
10. Ratchet, Field Medic // Ratchet, Rescue Racer — triggers

84 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 (Watcher of the Roost is one).

When Watcher of the Roost 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

117 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 (Watcher of the Roost is one).

When Watcher of the Roost 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

181 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 (Watcher of the Roost is one).

When Watcher of the Roost 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. Tide of War — sacrifices a creature
6. Dead-Iron Sledge — kills a creature
7. Dwindle — kills a creature
8. Shield of the Righteous — triggers

21 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 (Watcher of the Roost is one).

When Watcher of the Roost 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 (Watcher of the Roost is one).

When Watcher of the Roost enters:

1. Slash, Reptile Rampager — deals 2 damage
2. Ray Fillet, Wave Warrior — puts a counter on itself
3. The Neutrinos — gets +1/+0
4. Wingnut, Bat on the Belfry — grants flying, haste and menace
5. Aetherstorm Roc — puts a counter on a permanent you control
6. Raphael, Most Attitude — exiles a card from your library

303 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 (Watcher of the Roost is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When Watcher of the Roost enters, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself

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