Taken by Nightmares

you scry — 420 cards in the game can cause this (Taken by Nightmares is one).

When Taken by Nightmares 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.

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

When a creature is exiled thanks to Taken by Nightmares:

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

5 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 (Taken by Nightmares is one).

1. The War Doctor — When a creature is exiled thanks to Taken by Nightmares, The War Doctor puts a time counter on itself

an instant is cast — 3,931 cards in the game can cause this (Taken by Nightmares is one).

When Taken by Nightmares is cast:

1. Electro, Assaulting Battery — adds 1 mana
2. Elemental Expressionist — grants a keyword
3. Lunar Mystic — draws you 1 card
4. Ojer Pakpatiq, Deepest Epoch // Temple of Cyclical Time — grants rebound
5. Repeated Reverberation — copies an ability
6. Riku of Two Reflections — copies a spell
7. Sword of Wealth and Power — copies a spell
8. Lilah, Undefeated Slickshot — gets +1/+1
9. In the Eye of Chaos — counters a spell
10. Niblis of Frost — taps a creature an opponent controls

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

a nontoken creature leaves the battlefield — 4,133 cards in the game can cause this (Taken by Nightmares is one).

1. Dual Nature — When a creature leaves the battlefield thanks to Taken by Nightmares, Dual Nature exiles a creature

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

a creature leaves the battlefield — 4,238 cards in the game can cause this (Taken by Nightmares is one).

When a creature leaves the battlefield thanks to Taken by Nightmares:

1. Extractor Demon — mills a card
2. Valor of the Worthy — makes a token
3. Traveling Plague — returns itself from the graveyard
4. Funeral March — makes a player sacrifice a creature

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

anything is cast — 31,128 cards in the game can cause this (Taken by Nightmares is one).

When Taken by Nightmares is cast:

1. Windrider Wizard — draws you 1 card
2. Relic Amulet — puts a charge counter on itself
3. Rockslide Sorcerer — deals 1 damage
4. Umara Wizard // Umara Skyfalls — grants flying
5. Alania, Divergent Storm — makes an opponent draw 1 card
6. Umara Mystic — gets +2/+0
7. Master of Winds — triggers

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