Curse of Marit Lage

an Island becomes tapped — 2 cards in the game can cause this (Curse of Marit Lage is one).

1. Thoughtleech — When an Island becomes tapped thanks to Curse of Marit Lage, Thoughtleech gains you 1 life

a land becomes tapped — 50 cards in the game can cause this (Curse of Marit Lage is one).

When an Island becomes tapped thanks to Curse of Marit Lage:

1. Steam Vines — deals 1 damage
2. Pooling Venom — makes a player lose 2 life
3. Chronic Flooding — mills a card
4. Roots of Life — gains you 1 life
5. Psychic Venom — deals 2 damage
6. Orcish Mine — triggers
7. Spreading Algae — kills it
8. Blight — kills it
9. Uncontrolled Infestation — kills it
10. Kudzu — kills a land

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

an enchantment is cast — 3,673 cards in the game can cause this (Curse of Marit Lage is one).

When Curse of Marit Lage is cast:

1. Master Pakku — gets +1/+1
2. Hallowed Haunting — makes a token
3. Daxos the Returned — puts a counter on a permanent
4. Tatsunari, Toad Rider — makes a token
5. Sythis, Harvest's Hand — gains you 1 life
6. Sigil of the Empty Throne — makes a token
7. Dawnhart Geist — gains you 2 life
8. Herald of the Pantheon — gains you 1 life
9. Kami of Transience — puts a +1/+1 counter on itself
10. Argothian 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 (Curse of Marit Lage is one).

1. Historian's Boon — When Curse of Marit Lage enters, Historian's Boon makes a token

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

When Curse of Marit Lage enters:

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

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