Leviathan

an Island is put into a graveyard from the battlefield — 17 cards in the game can cause this (Leviathan is one).

1. Genju of the Falls — When an Island is put into a graveyard from the battlefield thanks to Leviathan, Genju of the Falls returns itself from the graveyard

hits creature — 2,298 cards in the game can cause this.

1. Jalira, Master Polymorphist — Jalira, Master Polymorphist can put Leviathan onto the battlefield from your library
2. Kethek, Crucible Goliath — Kethek, Crucible Goliath can put Leviathan onto the battlefield from your library
3. Polymorph — Polymorph can put Leviathan onto the battlefield from your library
4. Birthing Ritual — Birthing Ritual can put Leviathan onto the battlefield from your library
5. Industrial Advancement — Industrial Advancement can put Leviathan onto the battlefield from your library
6. Killer Instinct — Killer Instinct can put Leviathan onto the battlefield from your library
7. Arthur, Marigold Knight — Arthur, Marigold Knight can put Leviathan onto the battlefield from your library
8. Proteus Staff — Proteus Staff can put Leviathan onto the battlefield from your library
9. Synthetic Destiny — Synthetic Destiny can put Leviathan onto the battlefield from your library
10. Divergent Transformations — Divergent Transformations can put Leviathan onto the battlefield from your library
11. Mass Polymorph — Mass Polymorph can put Leviathan onto the battlefield from your library

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

a land is sacrificed — 438 cards in the game can cause this (Leviathan is one).

When an Island is sacrificed thanks to Leviathan:

1. Baloth Prime — makes a token
2. Scouring Swarm — makes a token
3. Hearthhull, the Worldseed — makes each opponent lose 2 life

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

Leviathan puts cards into the graveyard that:

1. Slogurk, the Overslime — can bring back
2. Zask, Skittering Swarmlord — can bring back
3. Glacierwood Siege — can bring back
4. Turntimber Sower — can bring back
5. Serra Paragon — can bring back
6. Muldrotha, the Gravetide — can bring back
7. Deadbridge Chant — can bring back
8. Invasion of Tolvada // The Broken Sky — can bring back
9. Pull Through the Weft — can bring back
10. Conduit of Worlds — can bring back

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 (Leviathan is one).

When an Island is put into a graveyard from the battlefield thanks to Leviathan:

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 land goes to a graveyard — 683 cards in the game can cause this (Leviathan is one).

When an Island hits the graveyard thanks to Leviathan:

1. The Gitrog Monster — draws you 1 card
2. Skola Grovedancer — gains you 1 life
3. Sand Scout — makes a token
4. Crawling Sensation — makes a token
5. Countryside Crusher — puts a +1/+1 counter on itself

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

anything is sacrificed — 3,450 cards in the game can cause this (Leviathan is one).

1. Gorbag of Minas Morgul — When an Island is sacrificed thanks to Leviathan, Gorbag of Minas Morgul triggers

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

a permanent is put into a graveyard from the battlefield — 5,057 cards in the game can cause this (Leviathan is one).

1. Long Feng, Grand Secretariat — When an Island dies thanks to Leviathan, Long Feng, Grand Secretariat puts a counter on a creature

10 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 (Leviathan is one).

1. Gale, Waterdeep Prodigy — Leviathan puts cards into the graveyard that Gale, Waterdeep Prodigy can bring back
2. Transplant Theorist — Leviathan puts cards into the graveyard that Transplant Theorist can bring back
3. Heart-Shaped Herb — Leviathan puts cards into the graveyard that Heart-Shaped Herb can bring back
4. Wayward Angel — Leviathan fills your graveyard toward the 7 or more cards Wayward Angel needs
5. Victimize — Leviathan puts cards into the graveyard that Victimize can bring back
6. Bound // Determined — Leviathan puts cards into the graveyard that Bound // Determined can bring back
7. Enlightened Confidant — Leviathan puts cards into the graveyard that Enlightened Confidant can bring back
8. Tergrid, God of Fright // Tergrid's Lantern — Leviathan puts cards into the graveyard that Tergrid, God of Fright // Tergrid's Lantern can bring back
9. Aerith, Last Ancient — Leviathan puts cards into the graveyard that Aerith, Last Ancient can bring back
10. Sivriss, Nightmare Speaker — Leviathan puts cards into the graveyard that Sivriss, Nightmare Speaker can bring back

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 (Leviathan is one).

When an Island hits the graveyard thanks to Leviathan:

1. Quest for Ancient Secrets — puts a quest counter on itself
2. Planar Void — hits a graveyard
3. Measure of Wickedness — gives an opponent control of itself
4. Energy Field — sacrifices itself

7 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 (Leviathan is one).

When Leviathan attacks:

1. Shaun, Father of Synths — makes a token
2. Optimus Prime, Hero // Optimus Prime, Autobot Leader — puts a counter on a permanent

131 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 (Leviathan is one).

When Leviathan 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 (Leviathan is one).

1. Samwise Gamgee — When Leviathan 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 (Leviathan is one).

1. Enduring Courage — When Leviathan enters, Enduring Courage gives +2/+0

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