Compost

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

When Compost 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 (Compost is one).

1. Historian's Boon — When Compost enters, Historian's Boon makes a token

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

1. Calix, Guided by Fate — When Compost enters, Calix, Guided by Fate puts a counter on a creature
2. Elvish Archivist — When Compost enters, Elvish Archivist draws you 1 card
3. Victor, Valgavoth's Seneschal — When Compost enters, Victor, Valgavoth's Seneschal surveils
4. Strength from the Fallen — When Compost enters, Strength from the Fallen gives +X/+X, where X is the number of creature cards in your graveyard
5. Doomwake Giant — When Compost enters, Doomwake Giant shrinks a creature by -1/-1
6. Cacophony Unleashed — When Compost enters, Cacophony Unleashed turns something into a creature
7. Ghostly Dancers — When Compost enters, Ghostly Dancers makes a token
8. Thassa's Devourer — When Compost enters, Thassa's Devourer mills a card
9. Killian, Decisive Mentor — When Compost enters, Killian, Decisive Mentor taps a creature
10. Thoughtrender Lamia — When Compost enters, Thoughtrender Lamia makes an opponent discard a card

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

a card is drawn — 3,815 cards in the game can cause this (Compost is one).

When Compost makes a player draw a card:

1. Teferi's Tutelage — mills a card
2. Temmet, Naktamun's Will — gives +1/+1
3. Niv-Mizzet, Parun — deals 1 damage
4. Aether Syphon — mills a card
5. The Locust God — makes a token
6. Starving Revenant — makes each opponent lose 1 life
7. Diviner's Wand — gets +1/+1
8. Ominous Seas — puts a foreshadow counter on itself
9. Dream Trawler — gets +1/+0
10. Iron Man, Armored Avenger — puts a counter on a creature

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

put anything into a graveyard — 7,589 cards in the game can cause this.

When a card hits the graveyard thanks to:

1. Specter's Shroud — Compost draws you 1 card
2. Sword of Feast and Famine — Compost draws you 1 card
3. Trepanation Blade — Compost draws you 1 card
4. Split the Spoils — Compost draws you 1 card
5. Mindcrank — Compost draws you 1 card
6. Flint Golem — Compost draws you 1 card
7. Void Attendant — Compost draws you 1 card
8. Ruin Processor — Compost draws you 1 card
9. Borderland Explorer — Compost draws you 1 card
10. Reality Smasher — Compost draws you 1 card

7,579 other cards cause it too. These are the ones with the most connections.