Detention Sphere

a battle enters the battlefield — 81 cards in the game can cause this (Detention Sphere is one).

When a Sphere enters thanks to Detention Sphere:

1. Builder's Talent — puts a counter on a creature
2. Brainstealer Dragon — makes a player lose life equal to its mana value
3. Cloudstone Curio — triggers

an artifact is exiled — 336 cards in the game can cause this (Detention Sphere is one).

1. Shard of the Void Dragon — When a Sphere is exiled thanks to Detention Sphere, Shard of the Void Dragon puts 2 +1/+1 counters on itself

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

a planeswalker enters the battlefield — 366 cards in the game can cause this (Detention Sphere is one).

When a Sphere enters thanks to Detention Sphere, Liliana the:

1. Liliana the Repentant — Repentant mills a card
2. Liliana the Faultless — Faultless gains you 1 life

3 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 (Detention Sphere is one).

When a Sphere is exiled thanks to Detention Sphere:

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 (Detention Sphere is one).

1. The War Doctor — When a Sphere is exiled thanks to Detention Sphere, The War Doctor puts a time counter on itself

an enchantment is cast — 3,673 cards in the game can cause this (Detention Sphere is one).

When Detention Sphere 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 (Detention Sphere is one).

1. Historian's Boon — When a Sphere enters thanks to Detention Sphere, Historian's Boon makes a token

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

When a Sphere enters thanks to Detention Sphere:

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

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

a nontoken artifact enters the battlefield — 3,768 cards in the game can cause this (Detention Sphere is one).

When a Sphere enters thanks to Detention Sphere:

1. Ultron, Artificial Malevolence — makes a token
2. The Prydwen, Steel Flagship — makes a token
3. Conquest Mission — puts a quest counter on itself
4. Surge Conductor — proliferates
5. Replication Specialist — makes a token
6. Weapons Manufacturing — makes a token
7. Mirrorworks — makes a token

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

1. Dual Nature — When a Sphere leaves the battlefield thanks to Detention Sphere, 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 (Detention Sphere is one).

When a Sphere leaves the battlefield thanks to Detention Sphere:

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.

an artifact enters the battlefield — 4,643 cards in the game can cause this (Detention Sphere is one).

When a Sphere enters thanks to Detention Sphere:

1. Sludge Strider — makes a player lose 1 life
2. Transplant Theorist — draws you 1 card
3. Golbez, Crystal Collector — surveils
4. Underhanded Designs — makes each opponent lose 1 life
5. Mechan Assembler — makes a token
6. Glassdust Hulk — gets +1/+1
7. Rook Turret — draws you 1 card
8. Hedron Detonator — deals 1 damage
9. Pactdoll Terror — makes each opponent lose 1 life
10. Mandible Justiciar — gets +1/+1

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

a nontoken creature enters the battlefield — 18,448 cards in the game can cause this (Detention Sphere is one).

When a Sphere enters thanks to Detention Sphere:

1. Riku of Two Reflections — makes a token
2. Samwise Gamgee — makes a token
3. Chainer, Nightmare Adept — grants haste
4. Preston, the Vanisher — makes a token
5. Faerie Artisans — makes a token
6. Lonis, Cryptozoologist — triggers

27 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 (Detention Sphere is one).

When a Sphere enters thanks to Detention Sphere:

1. Airbender Ascension — puts a quest counter on itself
2. Lunarch Veteran // Luminous Phantom — gains you 1 life

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