Yawning Fissure

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

Yawning Fissure 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 (Yawning Fissure is one).

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

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 sorcery is cast — 3,720 cards in the game can cause this (Yawning Fissure is one).

When Yawning Fissure is cast:

1. Death to Our Enemies — makes a token
2. Spellweaver Volute — copies a spell
3. Lilah, Undefeated Slickshot — gets +1/+1
4. Niblis of Frost — gets +1/+1
5. Primeval Bounty — puts 3 counters on a creature
6. Tetsuko Umezawa, Pursuer — gets +1/+1
7. Thor, God of Thunder — deals that spell's mana value damage
8. Krile Baldesion — brings a card back
9. Summon: Good King Mog XII — makes a token
10. Blood Funnel — sacrifices a creature

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

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

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

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