Study

a land enters the battlefield — 1,560 cards in the game can cause this (Study is one).

1. Primeval Bounty — When Study enters, Primeval Bounty gains you 3 life
2. Toph, Earthbending Master — When Study enters, Toph, Earthbending Master puts a counter on a permanent
3. Dancing from Dark to Dawn — When Study enters, Dancing from Dark to Dawn makes a token
4. Emeria Shepherd — When Study enters, Emeria Shepherd brings a card back
5. Quest for the Necropolis — When Study enters, Quest for the Necropolis puts a quest counter on itself
6. Soul Stair Expedition — When Study enters, Soul Stair Expedition puts a quest counter on itself
7. Nissa of Shadowed Boughs — When Study enters, Nissa of Shadowed Boughs puts counters on a permanent
8. Thranduil, Sindarin Liege // Silvan Rally — When Study enters, Thranduil, Sindarin Liege // Silvan Rally makes a token
9. Silvan Reveler — When Study enters, Silvan Reveler returns itself from the graveyard
10. Floral Evoker — When Study enters, Floral Evoker puts a +1/+1 counter on itself

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

a token enters the battlefield — 3,710 cards in the game can cause this (Study is one).

When a Clue enters thanks to Study:

1. Baron Bertram Graywater — makes a token
2. Marneus Calgar — draws you 1 card
3. Belladonna Took — gains you 1 life
4. Kambal, Profiteering Mayor — makes each opponent lose 1 life
5. Lucy MacLean, Positively Armed — makes a token
6. Mister Fantastic, Reed Richards — draws you 1 card
7. Cloakwood Swarmkeeper — puts a +1/+1 counter on itself
8. Woodland Champion — puts that many +1/+1 counters on itself
9. Leonardo, the Balance — puts a counter on a creature
10. Spiritcall Enthusiast // Scrollboost — becomes prepared

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

a token is created — 3,711 cards in the game can cause this (Study is one).

When Study makes a Clue token:

1. Akim, the Soaring Wind — makes a token
2. Idol of Oblivion — draws you 1 card
3. Rosie Cotton of South Lane — puts a counter on a permanent
4. Mirkwood Bats — makes each opponent lose 1 life

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

an artifact enters the battlefield — 4,643 cards in the game can cause this (Study is one).

When a Clue enters thanks to Study:

1. Transplant Theorist — draws you 1 card
2. Elvish Archivist — puts 2 +1/+1 counters on itself
3. Golbez, Crystal Collector — surveils
4. Sludge Strider — makes a player lose 1 life
5. Underhanded Designs — makes each opponent lose 1 life
6. Mechan Assembler — makes a token
7. Glassdust Hulk — gets +1/+1
8. Rook Turret — draws you 1 card
9. Hedron Detonator — deals 1 damage
10. Pactdoll Terror — makes each opponent lose 1 life

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

anything enters the battlefield — 26,499 cards in the game can cause this (Study is one).

When a Clue enters thanks to Study:

1. HYDRA Assault Robot — deals 1 damage
2. Era of Innovation — puts a counter on a permanent you control

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