Reign of the Pit

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

1. Electro, Assaulting Battery — When Electro, Assaulting Battery leaves the battlefield thanks to Reign of the Pit, it triggers
2. Gollum, Patient Plotter — When Gollum, Patient Plotter leaves the battlefield thanks to Reign of the Pit, it has the Ring tempt you
3. Chainer, Dementia Master — When Chainer, Dementia Master leaves the battlefield thanks to Reign of the Pit, it exiles a Nightmare

a Demon enters the battlefield — 284 cards in the game can cause this (Reign of the Pit is one).

When a Demon enters thanks to Reign of the Pit:

1. Blood Speaker — returns itself from the graveyard
2. Be'lakor, the Dark Master — deals its power damage

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

When a creature is sacrificed thanks to Reign of the Pit:

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 (Reign of the Pit is one).

When a creature is sacrificed thanks to Reign of the Pit:

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

20 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 (Reign of the Pit is one).

Reign of the Pit 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 (Reign of the Pit is one).

When a creature dies thanks to Reign of the Pit:

1. Zahur, Glory's Past — makes a token
2. Vraska, the Silencer — brings a card back
3. Liesa, Forgotten Archangel — brings a card back
4. Avacyn, Angel of Horror — brings a card back
5. Yedora, Grave Gardener — brings a card back
6. Nim Deathmantle — brings a card back
7. Valkyrie's Call — brings a card back
8. Decaying Soil — brings a card back
9. High-Society Hunter — draws you 1 card
10. Overseer of the Damned — makes a token

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

a creature token enters the battlefield — 2,799 cards in the game can cause this (Reign of the Pit is one).

When a Demon enters thanks to Reign of the Pit:

1. Securitron Squadron — puts a counter on a permanent
2. Anointer Priest — gains you 1 life
3. Nesting Dovehawk — puts a +1/+1 counter on itself

a creature token is created — 2,799 cards in the game can cause this (Reign of the Pit is one).

1. Staff of the Storyteller — When Reign of the Pit makes a Demon token, Staff of the Storyteller puts a story counter on itself

3 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 (Reign of the Pit is one).

1. Pious Evangel // Wayward Disciple — When a creature dies thanks to Reign of the Pit, Pious Evangel // Wayward Disciple makes each opponent lose 1 life
2. Daxos, Blessed by the Sun — When a creature dies thanks to Reign of the Pit, Daxos, Blessed by the Sun gains you 1 life
3. Elas il-Kor, Sadistic Pilgrim — When a creature dies thanks to Reign of the Pit, Elas il-Kor, Sadistic Pilgrim makes each opponent lose 1 life
4. Shriveling Rot — When a creature dies thanks to Reign of the Pit, Shriveling Rot makes a player lose life equal to its toughness
5. Boss's Chauffeur — When Boss's Chauffeur dies thanks to Reign of the Pit, it makes a token
6. Jeskai Sage — When Jeskai Sage dies thanks to Reign of the Pit, it draws you 1 card
7. Dinosaur Egg — When Dinosaur Egg dies thanks to Reign of the Pit, it triggers
8. Cyclops Superconductor — When Cyclops Superconductor dies thanks to Reign of the Pit, it triggers
9. Saffi Eriksdotter — When a creature dies thanks to Reign of the Pit, Saffi Eriksdotter sacrifices itself
10. Treacherous Vampire — When Treacherous Vampire dies thanks to Reign of the Pit, it makes you lose life

454 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 (Reign of the Pit is one).

1. Ninja Teen — When a creature leaves the battlefield thanks to Reign of the Pit, 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 (Reign of the Pit is one).

1. Ojer Taq, Deepest Foundation // Temple of Civilization — When Ojer Taq, Deepest Foundation // Temple of Civilization dies thanks to Reign of the Pit, it returns itself from the graveyard
2. Gerrard, Weatherlight Hero — When Gerrard, Weatherlight Hero dies thanks to Reign of the Pit, it exiles itself

18 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 (Reign of the Pit is one).

1. Havi, the All-Father — Reign of the Pit fills your graveyard toward the 4 or more cards Havi, the All-Father needs
2. Repentant Vampire — Reign of the Pit fills your graveyard toward the 7 or more cards Repentant Vampire needs
3. Athreos, Shroud-Veiled — Reign of the Pit puts cards into the graveyard that Athreos, Shroud-Veiled can bring back

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