Old-Growth Dryads

a library is searched — 982 cards in the game can cause this (Old-Growth Dryads is one).

When a land searches a library thanks to Old-Growth Dryads:

1. River Song — puts a +1/+1 counter on itself
2. Archivist of Oghma — gains you 1 life
3. Wan Shi Tong, Librarian — puts a +1/+1 counter on itself
4. Ob Nixilis, Unshackled — makes an opponent sacrifice a creature

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

When a land enters thanks to Old-Growth Dryads:

1. Curse of the Restless Dead — makes a token
2. Seed the Land — makes a token
3. Sarinth Greatwurm — makes a token
4. Shattered Angel — gains you 3 life
5. Zo-Zu the Punisher — deals 2 damage
6. Nightshade Harvester — makes each opponent lose 1 life
7. Deep Gnome Terramancer — searches a library
8. Ankh of Mishra — deals 2 damage
9. Polluted Bonds — makes each opponent lose 2 life
10. Sire of Stagnation — exiles a card from an opponent's library

199 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 (Old-Growth Dryads is one).

When Old-Growth Dryads attacks:

1. Far Fortune, End Boss — deals 1 damage
2. Temmet, Naktamun's Will — draws you 1 card
3. Grim Javelineer — gives +1/+0
4. Toph, Earthbending Master — puts a counter on a permanent
5. Invisible Woman — triggers
6. Caesar, Legion's Emperor — sacrifices a creature
7. Guide of Souls — triggers
8. Campsite Cuisine — sacrifices a Food
9. Gossip's Talent — triggers
10. Banon, the Returners' Leader — draws and discards

111 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 (Old-Growth Dryads is one).

When Old-Growth Dryads attacks:

1. Adaptive Omnitool — searches a library
2. Anthem of Rakdos — gives +2/+0
3. Kindred Discovery — draws you 1 card
4. Invasion of New Capenna // Holy Frazzle-Cannon — puts counters on a permanent
5. Chorale of the Void — brings a card back
6. Anim Pakal, Thousandth Moon — puts a +1/+1 counter on itself
7. Saw — sacrifices a creature
8. Gisa's Favorite Shovel — makes an opponent sacrifice a creature
9. Ultima Weapon — kills a creature an opponent controls
10. Total War — kills a creature

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

a creature blocks — 17,934 cards in the game can cause this (Old-Growth Dryads is one).

When Old-Growth Dryads blocks:

1. Mage Hunters' Onslaught — makes a player lose 1 life
2. Carnage Gladiator — makes a player lose 1 life
3. Tide of War — sacrifices a creature
4. Dead-Iron Sledge — kills a creature
5. Dwindle — kills a creature

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

a nontoken creature attacks — 17,934 cards in the game can cause this (Old-Growth Dryads is one).

1. Mardu Ascendancy — When Old-Growth Dryads attacks, Mardu Ascendancy makes a token

2 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 (Old-Growth Dryads is one).

When Old-Growth Dryads is cast:

1. Primeval Bounty — makes a token
2. Dancing from Dark to Dawn — puts that spell's mana value counters on a creature

89 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 (Old-Growth Dryads is one).

When Old-Growth Dryads enters:

1. Slash, Reptile Rampager — deals 2 damage
2. Ray Fillet, Wave Warrior — puts a counter on itself
3. The Neutrinos — gets +1/+0
4. Wingnut, Bat on the Belfry — grants flying, haste and menace
5. Aetherstorm Roc — puts a counter on a permanent you control
6. Raphael, Most Attitude — exiles a card from your library

304 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 (Old-Growth Dryads is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When Old-Growth Dryads enters, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself

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