Harvest Wurm

put a land into a graveyard — 634 cards in the game can cause this.

1. Sequestered Stash — Sequestered Stash puts cards into the graveyard that Harvest Wurm can bring back
2. Eden, Seat of the Sanctum — Eden, Seat of the Sanctum puts cards into the graveyard that Harvest Wurm can bring back

632 other cards cause it too. These are the ones with the most connections.

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

When you sacrifice Harvest Wurm:

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 (Harvest Wurm is one).

When you sacrifice Harvest Wurm:

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.

anything leaves a graveyard — 2,503 cards in the game can cause this (Harvest Wurm is one).

When a land leaves a graveyard thanks to Harvest Wurm:

1. Blastoneuron — makes each opponent lose 1 life
2. Defiled Crypt // Cadaver Lab — makes a token
3. Teval, the Balanced Scale — makes a token
4. Hologram Stalker — makes a token
5. Tormod, the Desecrator — makes a token
6. Quintorius, Field Historian — makes a token
7. Garrison Excavator — makes a token
8. Amzu, Swarm's Hunger — makes a token
9. Kirol, History Buff // Pack a Punch — becomes prepared
10. Teval's Judgment — triggers

13 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 (Harvest Wurm is one).

When Harvest Wurm is in the graveyard:

1. Chainer, Dementia Master — can bring it back
2. Havengul Lich — can bring it back
3. Liliana the Repentant — can bring it back
4. Paleoloth — can bring it back
5. Chainer, Nightmare Adept — can bring it back
6. Banon, the Returners' Leader — can bring it back
7. Surgical Suite // Hospital Room — can bring it back
8. Sword of Light and Shadow — can bring it back
9. Necromantic Thirst — can bring it back
10. Krile Baldesion — can bring it 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 (Harvest Wurm is one).

When Harvest Wurm dies:

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 (Harvest Wurm is one).

When Harvest Wurm dies:

1. Pious Evangel // Wayward Disciple — makes each opponent lose 1 life
2. Daxos, Blessed by the Sun — gains you 1 life
3. Elas il-Kor, Sadistic Pilgrim — makes each opponent lose 1 life
4. Shriveling Rot — makes a player lose life equal to its toughness
5. Meathook Massacre II — brings a card back
6. Saffi Eriksdotter — sacrifices itself

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 (Harvest Wurm is one).

1. Ninja Teen — When Harvest Wurm leaves the battlefield, Ninja Teen makes each opponent lose 1 life

34 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 (Harvest Wurm is one).

1. Havi, the All-Father — Harvest Wurm fills your graveyard toward the 4 or more cards Havi, the All-Father needs
2. Repentant Vampire — Harvest Wurm fills your graveyard toward the 7 or more cards Repentant Vampire needs
3. Treacherous Vampire — Harvest Wurm fills your graveyard toward the 7 or more cards Treacherous Vampire needs
4. Athreos, Shroud-Veiled — When Harvest Wurm is in the graveyard, Athreos, Shroud-Veiled can bring it back

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

anything attacks — 17,934 cards in the game can cause this (Harvest Wurm is one).

When Harvest Wurm attacks:

1. Shaun, Father of Synths — makes a token
2. Grim Javelineer — gives +1/+0
3. Clavileño, First of the Blessed — turns something into a creature

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

a creature attacks — 17,934 cards in the game can cause this (Harvest Wurm is one).

1. Chorale of the Void — When Harvest Wurm attacks, Chorale of the Void brings a card back

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

a creature is cast — 18,010 cards in the game can cause this (Harvest Wurm is one).

1. Quirion Beastcaller — When Harvest Wurm is cast, Quirion Beastcaller puts a +1/+1 counter on itself

90 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.

1. Boss's Chauffeur — When Harvest Wurm enters, Boss's Chauffeur puts a +1/+1 counter on itself
2. Dinosaur Egg — When Harvest Wurm enters, Dinosaur Egg puts a counter on itself
3. Mirrorpool — When Harvest Wurm enters because Mirrorpool copies it, its ability triggers again
4. Endless Sands — When Harvest Wurm enters thanks to Endless Sands, it sacrifices itself
5. Northampton Farm — When Harvest Wurm enters thanks to Northampton Farm, it sacrifices itself

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