Rottenmouth Viper

an enchantment leaves the battlefield — 1 card in the game can cause this (Rottenmouth Viper is one).

1. Dual Nature — When Dual Nature leaves the battlefield thanks to Rottenmouth Viper, it exiles an enchantment
2. Tombstone Stairwell — When Tombstone Stairwell leaves the battlefield thanks to Rottenmouth Viper, it kills an enchantment
3. Necromancy — When Necromancy leaves the battlefield thanks to Rottenmouth Viper, it triggers
4. Sporogenesis — When Sporogenesis leaves the battlefield thanks to Rottenmouth Viper, it triggers
5. Diabolic Servitude — When Diabolic Servitude leaves the battlefield thanks to Rottenmouth Viper, it exiles a creature or enchantment

anything leaves the battlefield — 1 card in the game can cause this (Rottenmouth Viper is one).

1. Shaun, Father of Synths — When Shaun, Father of Synths leaves the battlefield thanks to Rottenmouth Viper, it exiles a Synth you control
2. Chainer, Dementia Master — When Chainer, Dementia Master leaves the battlefield thanks to Rottenmouth Viper, it exiles a Nightmare

hits creature — 2,298 cards in the game can cause this (Rottenmouth Viper is one).

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

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

a battle in a graveyard — 129 cards in the game can cause this (Rottenmouth Viper is one).

Rottenmouth Viper puts cards into the:

1. The Emperor of Palamecia // The Lord Master of Hell — graveyard, and The Emperor of Palamecia // The Lord Master of Hell gets bigger
2. Builder's Talent — graveyard that Builder's Talent can bring back
3. Tasigur, the Golden Fang — graveyard that Tasigur, the Golden Fang can bring back
4. Serpent of the Pass — graveyard, and Serpent of the Pass gets bigger
5. Emeria Shepherd — graveyard that Emeria Shepherd can bring back
6. Moment of Reckoning — graveyard that Moment of Reckoning can bring back
7. Serra Paragon — graveyard that Serra Paragon can bring back
8. Muldrotha, the Gravetide — graveyard that Muldrotha, the Gravetide can bring back
9. Deadbridge Chant — graveyard that Deadbridge Chant can bring back
10. Loamcrafter Faun — graveyard that Loamcrafter Faun can bring back

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

a battle is put into a graveyard from the battlefield — 129 cards in the game can cause this (Rottenmouth Viper is one).

1. Martyr's Bond — When Rottenmouth Viper is put into a graveyard from the battlefield, Martyr's Bond makes an opponent sacrifice a permanent

a Snake deals combat damage — 226 cards in the game can cause this (Rottenmouth Viper is one).

1. Seshiro the Anointed — When Rottenmouth Viper deals combat damage, Seshiro the Anointed draws you 1 card

a nontoken Snake enters the battlefield — 227 cards in the game can cause this (Rottenmouth Viper is one).

1. Sosuke's Summons — When Rottenmouth Viper enters, Sosuke's Summons returns itself from the graveyard

a planeswalker in a graveyard — 232 cards in the game can cause this (Rottenmouth Viper is one).

Rottenmouth Viper puts cards into the:

1. Liliana the Repentant — graveyard that Liliana the Repentant can bring back
2. Invasion of Tolvada // The Broken Sky — graveyard that Invasion of Tolvada // The Broken Sky can bring back
3. Winter, Tormented Loner — graveyard, and Winter, Tormented Loner gets bigger
4. Pestilent Cauldron // Restorative Burst — graveyard that Pestilent Cauldron // Restorative Burst can bring back
5. The Eldest Reborn — graveyard that The Eldest Reborn can bring back
6. Blood on the Snow — graveyard that Blood on the Snow can bring back
7. Yawgmoth's Vile Offering — graveyard that Yawgmoth's Vile Offering can bring back
8. Dark Intimations — graveyard that Dark Intimations can bring back
9. Overlord of the Balemurk — graveyard that Overlord of the Balemurk can bring back
10. Nicol Bolas, the Ravager // Nicol Bolas, the Arisen — graveyard that Nicol Bolas, the Ravager // Nicol Bolas, the Arisen can bring back

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

a planeswalker is put into a graveyard from the battlefield — 232 cards in the game can cause this (Rottenmouth Viper is one).

1. Carth the Lion — When a planeswalker dies thanks to Rottenmouth Viper, Carth the Lion searches a library
2. Massacre Girl, Most Wanted — When Rottenmouth Viper dies, Massacre Girl, Most Wanted deals 1 damage
3. Kaya's Ghostform — When Rottenmouth Viper dies, Kaya's Ghostform brings a card back
4. Edgar, Ancient Bloodlord — When Rottenmouth Viper dies, Edgar, Ancient Bloodlord gains you 1 life
5. Cruel Celebrant — When Rottenmouth Viper dies, Cruel Celebrant makes each opponent lose 1 life
6. Rising Populace — When Rottenmouth Viper dies, Rising Populace puts a +1/+1 counter on itself
7. Ajani's Last Stand — When Rottenmouth Viper dies, Ajani's Last Stand sacrifices itself

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

an enchantment is sacrificed — 588 cards in the game can cause this (Rottenmouth Viper is one).

1. Narci, Fable Singer — When an enchantment is sacrificed thanks to Rottenmouth Viper, Narci, Fable Singer draws you 1 card

a nontoken artifact is sacrificed — 740 cards in the game can cause this (Rottenmouth Viper is one).

1. Bag of Devouring — When a creature is sacrificed thanks to Rottenmouth Viper, Bag of Devouring exiles it

an Elemental enters the battlefield — 754 cards in the game can cause this (Rottenmouth Viper is one).

When Rottenmouth Viper enters:

1. Champion of the Path — deals its power damage
2. Risen Reef — puts a land onto the battlefield

an artifact is sacrificed — 761 cards in the game can cause this (Rottenmouth Viper is one).

1. Megatron, Tyrant // Megatron, Destructive Force — When an artifact is sacrificed thanks to Rottenmouth Viper, Megatron, Tyrant // Megatron, Destructive Force deals the sacrificed artifact's mana value damage
2. Carrot Cake — When Carrot Cake is sacrificed thanks to Rottenmouth Viper, it makes a token
3. Heaped Harvest — When Heaped Harvest is sacrificed thanks to Rottenmouth Viper, it searches a library
4. Moonstone Eulogist — When an artifact is sacrificed thanks to Rottenmouth Viper, Moonstone Eulogist puts a +1/+1 counter on itself
5. Magnetic Snuffler — When an artifact is sacrificed thanks to Rottenmouth Viper, Magnetic Snuffler puts a +1/+1 counter on itself
6. Gleaming Geardrake — When an artifact is sacrificed thanks to Rottenmouth Viper, Gleaming Geardrake puts a +1/+1 counter on itself
7. Esoteric Duplicator — When an artifact is sacrificed thanks to Rottenmouth Viper, Esoteric Duplicator makes a token
8. Biotech Specialist — When an artifact is sacrificed thanks to Rottenmouth Viper, Biotech Specialist deals 2 damage
9. Jaws, Relentless Predator — When an artifact is sacrificed thanks to Rottenmouth Viper, Jaws, Relentless Predator deals 1 damage

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