Eyes of the Watcher

you scry — 420 cards in the game can cause this (Eyes of the Watcher is one).

When Eyes of the Watcher scries:

1. Prudent Fateseer // Peer Review — gives +1/+0
2. Diviner of Victory // Unwind History — gets +1/+1
3. Saheeli, Consul of Oversight — makes a token
4. Celeborn the Wise — makes your creatures bigger
5. Proft, Consulting Detective — puts a +1/+1 counter on itself
6. Matoya, Archon Elder — draws you 1 card
7. Denzilore Fatehold — puts a counter on a creature
8. Elminster — costs less
9. Elrond, Master of Healing — puts a counter on a creature
10. Galadriel of Lothlórien — puts a land onto the battlefield

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

an enchantment is cast — 3,673 cards in the game can cause this (Eyes of the Watcher is one).

When Eyes of the Watcher is cast:

1. Hallowed Haunting — makes a token
2. Daxos the Returned — puts a counter on a permanent
3. Tatsunari, Toad Rider — makes a token
4. Sythis, Harvest's Hand — gains you 1 life
5. Sigil of the Empty Throne — makes a token
6. Dawnhart Geist — gains you 2 life
7. Herald of the Pantheon — gains you 1 life
8. Kami of Transience — puts a +1/+1 counter on itself
9. Argothian Enchantress — draws you 1 card
10. Mesa Enchantress — draws you 1 card

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

a nontoken enchantment enters the battlefield — 3,691 cards in the game can cause this (Eyes of the Watcher is one).

1. Historian's Boon — When Eyes of the Watcher enters, Historian's Boon makes a token

cast a sorcery — 3,720 cards in the game can cause this.

1. Mission Briefing — When Mission Briefing is cast, Eyes of the Watcher scries
2. Sorcerous Squall — When Sorcerous Squall is cast, Eyes of the Watcher scries
3. Spectral Arcanist — When an instant is cast thanks to Spectral Arcanist, Eyes of the Watcher scries
4. Jace, Vryn's Prodigy // Jace, Telepath Unbound — When an instant is cast thanks to Jace, Vryn's Prodigy // Jace, Telepath Unbound, Eyes of the Watcher scries
5. Diviner of Mist — When an instant is cast thanks to Diviner of Mist, Eyes of the Watcher scries
6. Jace's Mindseeker — When an instant is cast thanks to Jace's Mindseeker, Eyes of the Watcher scries
7. Helmut Zemo, Mastermind — When an instant is cast thanks to Helmut Zemo, Mastermind, Eyes of the Watcher scries
8. Quistis Trepe — When an instant is cast thanks to Quistis Trepe, Eyes of the Watcher scries
9. Daring Waverider — When an instant is cast thanks to Daring Waverider, Eyes of the Watcher scries
10. Demilich — When an instant is cast thanks to Demilich, Eyes of the Watcher scries

3,710 other cards cause it too. These are the ones with the most connections.

an enchantment enters the battlefield — 3,743 cards in the game can cause this (Eyes of the Watcher is one).

When Eyes of the Watcher enters:

1. Calix, Guided by Fate — puts a counter on a creature
2. Elvish Archivist — draws you 1 card
3. Victor, Valgavoth's Seneschal — surveils
4. Strength from the Fallen — gives +X/+X, where X is the number of creature cards in your graveyard
5. Doomwake Giant — shrinks a creature by -1/-1
6. Cacophony Unleashed — turns something into a creature
7. Ghostly Dancers — makes a token
8. Thassa's Devourer — mills a card
9. Killian, Decisive Mentor — taps a creature
10. Thoughtrender Lamia — makes an opponent discard a card

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

cast an instant — 3,931 cards in the game can cause this.

1. Rite of Undoing — When Rite of Undoing is cast, Eyes of the Watcher scries
2. Logic Knot — When Logic Knot is cast, Eyes of the Watcher scries
3. Dig Through Time — When Dig Through Time is cast, Eyes of the Watcher scries
4. Complete the Circuit — When Complete the Circuit is cast, Eyes of the Watcher scries
5. Synthetic Destiny — When Synthetic Destiny is cast, Eyes of the Watcher scries
6. Stoic Rebuttal — When Stoic Rebuttal is cast, Eyes of the Watcher scries
7. Elite Arcanist — When an instant is cast thanks to Elite Arcanist, Eyes of the Watcher scries
8. Obyra's Attendants // Desperate Parry — When Obyra's Attendants // Desperate Parry is cast, Eyes of the Watcher scries
9. Hypnotic Sprite // Mesmeric Glare — When Hypnotic Sprite // Mesmeric Glare is cast, Eyes of the Watcher scries
10. Winds of Rebuke — When Winds of Rebuke is cast, Eyes of the Watcher scries

3,921 other cards cause it too. These are the ones with the most connections.

anything enters the battlefield — 26,499 cards in the game can cause this (Eyes of the Watcher is one).

1. Nature's Wrath — When Eyes of the Watcher enters, Nature's Wrath makes a player sacrifice an Island or permanent

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