Sandworm

a land in a graveyard — 634 cards in the game can cause this (Sandworm is one).

Sandworm puts cards into the:

1. Dread Tiller — graveyard that Dread Tiller can bring back
2. Sparring Dummy — graveyard that Sparring Dummy can bring back
3. Waking the Trolls — graveyard that Waking the Trolls can bring back
4. Soul of Windgrace — graveyard that Soul of Windgrace can bring back
5. Patient Naturalist — graveyard that Patient Naturalist can bring back
6. Blanchwood Prowler — graveyard that Blanchwood Prowler can bring back
7. Fall of the Thran — graveyard that Fall of the Thran can bring back
8. Mind Roots — graveyard that Mind Roots can bring back
9. Centaur Vinecrasher — graveyard, and Centaur Vinecrasher gets bigger
10. Terravore — graveyard, and Terravore gets bigger

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

a land is put into a graveyard from the battlefield — 636 cards in the game can cause this (Sandworm is one).

When a land is put into a graveyard from the battlefield thanks to Sandworm:

1. Vastwood Zendikon — brings a card back
2. Nissa's Zendikon — brings a card back
3. Corrupted Zendikon — brings a card back
4. Guardian Zendikon — brings a card back
5. Crusher Zendikon — brings a card back
6. Wind Zendikon — brings a card back
7. Akki Raider — gets +1/+0
8. Dingus Egg — deals 2 damage
9. Genju of the Realm — returns itself from the graveyard

1 other card cares about it too. These are the ones with the most connections.

a library is searched — 982 cards in the game can cause this (Sandworm is one).

When a land searches a library thanks to Sandworm:

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 card in a graveyard — 7,589 cards in the game can cause this (Sandworm is one).

1. Heart-Shaped Herb — Sandworm puts cards into the graveyard that Heart-Shaped Herb can bring back
2. Enlightened Confidant — Sandworm puts cards into the graveyard that Enlightened Confidant can bring back
3. Tergrid, God of Fright // Tergrid's Lantern — Sandworm puts cards into the graveyard that Tergrid, God of Fright // Tergrid's Lantern can bring back
4. Grazing Kelpie — Sandworm puts cards into the graveyard that Grazing Kelpie can bring back
5. Dauthi Voidwalker — Cards Sandworm would put into an opponent's graveyard are exiled by Dauthi Voidwalker instead, and it can play from among them
6. Endurance — Sandworm puts cards into the graveyard that Endurance can bring back
7. Thieves' Guild Enforcer — Sandworm fills an opponent's graveyard toward the 8 or more cards Thieves' Guild Enforcer needs
8. Soaring Thought-Thief — Sandworm fills an opponent's graveyard toward the 8 or more cards Soaring Thought-Thief needs
9. Athreos, Shroud-Veiled — Sandworm puts cards into the graveyard that Athreos, Shroud-Veiled can bring back
10. Merfolk Windrobber — Sandworm fills an opponent's graveyard toward the 8 or more cards Merfolk Windrobber needs

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

anything goes to a graveyard — 7,589 cards in the game can cause this (Sandworm is one).

When a land hits the graveyard thanks to Sandworm:

1. The Haunt of Hightower — puts a +1/+1 counter on itself
2. Duskmantle Guildmage — makes each opponent lose 1 life
3. Vulturous Zombie — puts a +1/+1 counter on itself
4. Bloodchief Ascension — makes each opponent lose 2 life
5. Planar Void — hits a graveyard

6 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 (Sandworm is one).

When Sandworm attacks:

1. Shaun, Father of Synths — makes a token
2. Far Fortune, End Boss — deals 1 damage
3. Temmet, Naktamun's Will — draws you 1 card
4. Optimus Prime, Hero // Optimus Prime, Autobot Leader — 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

125 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 (Sandworm is one).

When Sandworm attacks:

1. Adaptive Omnitool — searches a library
2. Saw — sacrifices a creature

199 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 (Sandworm is one).

1. Tide of War — When Sandworm blocks, Tide of War sacrifices a creature

29 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 (Sandworm is one).

When Sandworm is cast:

1. God-Eternal Oketra — makes a token
2. Bloodbond March — brings a card back

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

a nontoken creature enters the battlefield — 18,448 cards in the game can cause this (Sandworm is one).

1. Samwise Gamgee — When Sandworm enters, Samwise Gamgee makes a token

32 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 (Sandworm is one).

When Sandworm enters:

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

365 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 (Sandworm is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When Sandworm enters, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself

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