Neoform

anything leaves the battlefield — 1 card in the game can cause this (Neoform is one).

1. Electro, Assaulting Battery — When Electro, Assaulting Battery leaves the battlefield thanks to Neoform, it triggers
2. Chainer, Dementia Master — When Chainer, Dementia Master leaves the battlefield thanks to Neoform, it exiles a Nightmare

a nontoken creature is sacrificed — 1,714 cards in the game can cause this (Neoform is one).

When a creature is sacrificed thanks to Neoform:

1. Fumulus, the Infestation — makes a token
2. Bag of Devouring — exiles it

a creature is sacrificed — 1,741 cards in the game can cause this (Neoform is one).

When a creature is sacrificed thanks to Neoform:

1. Ziatora, the Incinerator — deals that creature's power damage
2. Dina, Essence Brewer — draws you 1 card
3. Fleshtaker — gains you 1 life
4. Body Dropper — puts a +1/+1 counter on itself
5. Smothering Abomination — draws you 1 card
6. Kels, Fight Fixer — draws you 1 card
7. Caesar, Legion's Emperor — triggers
8. Grist, the Hunger Tide — kills a creature or planeswalker an opponent controls
9. Cabal Therapist — triggers
10. Rakdos, the Muscle — exiles a card from an opponent's library

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

a creature in a graveyard — 2,769 cards in the game can cause this (Neoform is one).

Neoform puts cards into the graveyard that:

1. Havengul Lich — can bring back
2. Liliana the Repentant — can bring back
3. Paleoloth — can bring back
4. Chainer, Nightmare Adept — can bring back
5. Banon, the Returners' Leader — can bring back
6. Surgical Suite // Hospital Room — can bring back
7. Sword of Light and Shadow — can bring back
8. Necromantic Thirst — can bring back
9. Krile Baldesion — can bring back
10. Extus, Oriq Overlord // Awaken the Blood Avatar — can bring back

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

a nontoken creature dies — 2,769 cards in the game can cause this (Neoform is one).

When a creature dies thanks to Neoform:

1. Zahur, Glory's Past — makes a token
2. Liesa, Forgotten Archangel — brings a card back
3. Avacyn, Angel of Horror — brings a card back
4. Yedora, Grave Gardener — brings a card back
5. Nim Deathmantle — brings a card back
6. Valkyrie's Call — brings a card back
7. Decaying Soil — brings a card back
8. High-Society Hunter — draws you 1 card
9. Liliana, Heretical Healer // Liliana, Defiant Necromancer — flickers itself
10. Body Launderer — draws and discards

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

a creature dies — 2,830 cards in the game can cause this (Neoform is one).

When a creature dies thanks to Neoform:

1. Ob Nixilis, Unshackled — puts a +1/+1 counter on itself
2. Pious Evangel // Wayward Disciple — makes each opponent lose 1 life
3. Daxos, Blessed by the Sun — gains you 1 life
4. Elas il-Kor, Sadistic Pilgrim — makes each opponent lose 1 life

458 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 (Neoform is one).

1. Ninja Teen — When a creature leaves the battlefield thanks to Neoform, Ninja Teen makes each opponent lose 1 life

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

a permanent is put into a graveyard from the battlefield — 5,057 cards in the game can cause this (Neoform is one).

1. Gerrard, Weatherlight Hero — When Gerrard, Weatherlight Hero dies thanks to Neoform, it exiles itself

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

a card in a graveyard — 7,589 cards in the game can cause this (Neoform is one).

1. Havi, the All-Father — Neoform fills your graveyard toward the 4 or more cards Havi, the All-Father needs

443 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 (Neoform is one).

1. Odunos River Trawler — When Odunos River Trawler enters thanks to Neoform, it brings a card back
2. Technomancer — When Technomancer enters thanks to Neoform, it mills a card
3. Sludge Titan — When Sludge Titan enters thanks to Neoform, it mills a card
4. Moriok Scavenger — When Moriok Scavenger enters thanks to Neoform, it brings a card back
5. Corpse Cur — When Corpse Cur enters thanks to Neoform, it brings a card back
6. Rayblade Trooper — When Rayblade Trooper enters thanks to Neoform, it puts a counter on a creature
7. Puppeteer Clique — When Puppeteer Clique enters thanks to Neoform, it brings a card back
8. Crypt Angel — When Crypt Angel enters thanks to Neoform, it brings a card back
9. Enslaved Horror — When Enslaved Horror enters thanks to Neoform, it brings a card back
10. Overseer of the Damned — When Overseer of the Damned enters thanks to Neoform, it kills a creature an opponent controls

438 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 (Neoform is one).

1. Wan Shi Tong, Librarian — When Wan Shi Tong, Librarian enters thanks to Neoform, it puts X counters on a permanent
2. Malik, Grim Manipulator — When Malik, Grim Manipulator enters thanks to Neoform, it triggers
3. The Master, Transcendent — When The Master, Transcendent enters thanks to Neoform, it puts 2 counters on a permanent
4. Borg Queen, Perfection Manifest — When Borg Queen, Perfection Manifest enters thanks to Neoform, it brings a card back
5. Alharu, Solemn Ritualist — When Alharu, Solemn Ritualist enters thanks to Neoform, it puts a counter on a creature
6. Garna, the Bloodflame — When Garna, the Bloodflame enters thanks to Neoform, it brings a card back
7. Ruxa, Patient Professor — When Ruxa, Patient Professor enters thanks to Neoform, it brings a card back
8. Legate Lanius, Caesar's Ace — When Legate Lanius, Caesar's Ace enters thanks to Neoform, it makes an opponent sacrifice a creature
9. Vastlands Scavenger // Bind to Life — When Vastlands Scavenger // Bind to Life enters thanks to Neoform, it becomes prepared

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