Smallpox

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

1. Slogurk, the Overslime — When Slogurk, the Overslime leaves the battlefield thanks to Smallpox, it brings a card back
2. Electro, Assaulting Battery — When Electro, Assaulting Battery leaves the battlefield thanks to Smallpox, it triggers
3. Chainer, Dementia Master — When Chainer, Dementia Master leaves the battlefield thanks to Smallpox, it exiles a Nightmare

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

When a land is sacrificed thanks to Smallpox:

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 (Smallpox is one).

Smallpox puts cards into the graveyard that:

1. Zask, Skittering Swarmlord — can bring back
2. Glacierwood Siege — can bring back
3. Turntimber Sower — can bring back
4. Dredger's Insight — can bring back
5. Bramble Familiar // Fetch Quest — can bring back
6. Serra Paragon — can bring back
7. Muldrotha, the Gravetide — can bring back
8. Deadbridge Chant — can bring back
9. Invasion of Tolvada // The Broken Sky — can bring back
10. Awaken the Honored Dead — 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 (Smallpox is one).

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

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 (Smallpox is one).

When a card hits the graveyard thanks to Smallpox:

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.

a nontoken creature is sacrificed — 1,714 cards in the game can cause this (Smallpox is one).

When a creature is sacrificed thanks to Smallpox:

1. Fumulus, the Infestation — makes a token
2. Bag of Devouring — exiles it

a creature is sacrificed — 1,741 cards in the game can cause this (Smallpox is one).

When a creature is sacrificed thanks to Smallpox:

1. Ziatora, the Incinerator — deals that creature's power damage
2. Dina, Essence Brewer — draws you 1 card
3. Fleshtaker — gains you 1 life
4. Body Dropper — puts a +1/+1 counter on itself
5. Smothering Abomination — draws you 1 card
6. Kels, Fight Fixer — draws you 1 card
7. Caesar, Legion's Emperor — triggers
8. Grist, the Hunger Tide — kills a creature or planeswalker an opponent controls
9. Cabal Therapist — triggers
10. Rakdos, the Muscle — exiles a card from an opponent's library

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

a card is discarded — 2,042 cards in the game can cause this (Smallpox is one).

When Smallpox makes a player discard a card:

1. Ivora, Insatiable Heir — puts a +1/+1 counter on itself
2. Cool but Rude — deals 2 damage
3. Containment Construct — brings a card back
4. Moonstone, Harsh Mistress — brings a card back
5. Sangromancer — gains you 3 life
6. Lo and Li, Royal Advisors — puts a counter on an Advisor
7. Nath of the Gilt-Leaf — makes a token
8. Inti, Seneschal of the Sun — exiles a card from your library
9. Pitchstone Wall — sacrifices itself
10. Currency Converter — exiles it

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

a creature in a graveyard — 2,769 cards in the game can cause this (Smallpox is one).

Smallpox puts cards into the graveyard that:

1. Havengul Lich — can bring back
2. Liliana the Repentant — can bring back
3. Paleoloth — can bring back
4. Chainer, Nightmare Adept — can bring back
5. Banon, the Returners' Leader — can bring back
6. Surgical Suite // Hospital Room — can bring back
7. Sword of Light and Shadow — can bring back
8. Necromantic Thirst — can bring back

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