Watcher of the Spheres

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

When Watcher of the Spheres 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 Spheres is one).

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

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

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

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

a Bird it boosts — 499 cards in the game can cause this.

1. Murmuration — Murmuration gives Watcher of the Spheres bigger stats

498 other cards cause it too. These are the ones with the most connections.

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

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

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

a Bird creature it boosts — 541 cards in the game can cause this.

1. Soulcatchers' Aerie — Soulcatchers' Aerie gives Watcher of the Spheres bigger stats

540 other cards cause it too. These are the ones with the most connections.

a nontoken Wizard enters the battlefield — 1,243 cards in the game can cause this (Watcher of the Spheres is one).

1. Inalla, Archmage Ritualist — When Watcher of the Spheres enters, Inalla, Archmage Ritualist makes a token

a Wizard creature enters the battlefield — 1,264 cards in the game can cause this (Watcher of the Spheres is one).

1. Diviner's Wand — When Watcher of the Spheres enters, Diviner's Wand triggers

a Wizard creature it grants abilities to — 1,269 cards in the game can cause this.

1. Astrologian's Planisphere — Astrologian's Planisphere gives Watcher of the Spheres an extra ability

1,268 other cards cause it too. These are the ones with the most connections.

a Wizard creature it grants types to — 1,269 cards in the game can cause this.

1. Blue Mage's Cane — Blue Mage's Cane gives Watcher of the Spheres an extra creature type

1,268 other cards cause it too. These are the ones with the most connections.

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

When Watcher of the Spheres 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

489 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 Spheres is one).

When Watcher of the Spheres 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

843 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 Spheres is one).

When Watcher of the Spheres 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

131 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 Spheres is one).

When Watcher of the Spheres attacks:

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

a creature it makes cheaper to cast — 19,392 cards in the game can cause this (Watcher of the Spheres is one).

Watcher of the Spheres reduces what:

1. Windrider Wizard — costs
2. Master of Winds — costs
3. Skyfire Phoenix — costs
4. Umara Mystic — costs
5. Norn's Choirmaster — costs
6. Canoptek Spyder — costs
7. Brainstealer Dragon — costs
8. Defiler of Dreams — costs
9. Rankle and Torbran — costs
10. Olivia, Mobilized for War — costs

19,381 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 (Watcher of the Spheres is one).

When Watcher of the Spheres 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

3,029 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 Spheres is one).

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

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