Heartfire

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

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

a planeswalker in a graveyard — 232 cards in the game can cause this (Heartfire is one).

Heartfire puts cards into the:

1. Liliana the Repentant — graveyard that Liliana the Repentant can bring back
2. The Emperor of Palamecia // The Lord Master of Hell — graveyard, and The Emperor of Palamecia // The Lord Master of Hell gets bigger
3. Builder's Talent — graveyard that Builder's Talent can bring back
4. Tasigur, the Golden Fang — graveyard that Tasigur, the Golden Fang can bring back
5. Serpent of the Pass — graveyard, and Serpent of the Pass gets bigger
6. Emeria Shepherd — graveyard that Emeria Shepherd can bring back
7. Moment of Reckoning — graveyard that Moment of Reckoning can bring back
8. Serra Paragon — graveyard that Serra Paragon can bring back
9. Muldrotha, the Gravetide — graveyard that Muldrotha, the Gravetide can bring back
10. Deadbridge Chant — graveyard that Deadbridge Chant can bring back

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

a planeswalker is put into a graveyard from the battlefield — 232 cards in the game can cause this (Heartfire is one).

1. Carth the Lion — When a planeswalker dies thanks to Heartfire, Carth the Lion searches a library
2. Massacre Girl, Most Wanted — When a creature dies thanks to Heartfire, Massacre Girl, Most Wanted deals 1 damage
3. Kaya's Ghostform — When a creature dies thanks to Heartfire, Kaya's Ghostform brings a card back
4. Edgar, Ancient Bloodlord — When a creature dies thanks to Heartfire, Edgar, Ancient Bloodlord gains you 1 life
5. Cruel Celebrant — When a creature dies thanks to Heartfire, Cruel Celebrant makes each opponent lose 1 life
6. Rising Populace — When a creature dies thanks to Heartfire, Rising Populace puts a +1/+1 counter on itself
7. Ajani's Last Stand — When a creature dies thanks to Heartfire, Ajani's Last Stand sacrifices itself
8. Martyr's Bond — When a creature is put into a graveyard from the battlefield thanks to Heartfire, Martyr's Bond makes an opponent sacrifice a permanent

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

When a creature is sacrificed thanks to Heartfire:

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 (Heartfire is one).

When a creature is sacrificed thanks to Heartfire:

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 (Heartfire is one).

Heartfire puts cards into the graveyard that:

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

When a creature dies thanks to Heartfire:

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 (Heartfire is one).

1. Pious Evangel // Wayward Disciple — When a creature dies thanks to Heartfire, Pious Evangel // Wayward Disciple makes each opponent lose 1 life
2. Daxos, Blessed by the Sun — When a creature dies thanks to Heartfire, Daxos, Blessed by the Sun gains you 1 life
3. Elas il-Kor, Sadistic Pilgrim — When a creature dies thanks to Heartfire, Elas il-Kor, Sadistic Pilgrim makes each opponent lose 1 life
4. Shriveling Rot — When a creature dies thanks to Heartfire, Shriveling Rot makes a player lose life equal to its toughness
5. Cyclops Superconductor — When Cyclops Superconductor dies thanks to Heartfire, it triggers

456 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 (Heartfire is one).

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

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

16 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 (Heartfire is one).

1. Havi, the All-Father — Heartfire 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.