Fumulus, the Infestation

a Slug attacks — 17 cards in Fumulus's colors can cause this.

1. Bloodline Pretender — When Bloodline Pretender attacks, Fumulus, the Infestation makes each opponent lose 1 life
2. Barkform Harvester — When Barkform Harvester attacks, Fumulus, the Infestation makes each opponent lose 1 life
3. Graveshifter — When Graveshifter attacks, Fumulus, the Infestation makes each opponent lose 1 life
4. Three Tree Mascot — When Three Tree Mascot attacks, Fumulus, the Infestation makes each opponent lose 1 life
5. Universal Automaton — When Universal Automaton attacks, Fumulus, the Infestation makes each opponent lose 1 life
6. Rooftop Percher — When Rooftop Percher attacks, Fumulus, the Infestation makes each opponent lose 1 life
7. Changeling Wayfinder — When Changeling Wayfinder attacks, Fumulus, the Infestation makes each opponent lose 1 life
8. Ghostly Changeling — When Ghostly Changeling attacks, Fumulus, the Infestation makes each opponent lose 1 life
9. Moonglove Changeling — When Moonglove Changeling attacks, Fumulus, the Infestation makes each opponent lose 1 life
10. Skeletal Changeling — When Skeletal Changeling attacks, Fumulus, the Infestation makes each opponent lose 1 life

7 other cards cause it too. These are the ones with the most connections.

an Insect attacks — 109 cards in Fumulus's colors can cause this.

1. Nantuko Husk — When Nantuko Husk attacks, Fumulus, the Infestation makes each opponent lose 1 life
2. Dross Hopper — When Dross Hopper attacks, Fumulus, the Infestation makes each opponent lose 1 life
3. Devouring Swarm — When Devouring Swarm attacks, Fumulus, the Infestation makes each opponent lose 1 life
4. Chitin Gravestalker — When Chitin Gravestalker attacks, Fumulus, the Infestation makes each opponent lose 1 life
5. Necrosquito — When Necrosquito attacks, Fumulus, the Infestation makes each opponent lose 1 life
6. Swarm of Bloodflies — When Swarm of Bloodflies attacks, Fumulus, the Infestation makes each opponent lose 1 life
7. Great Fierce Bee — When Great Fierce Bee attacks, Fumulus, the Infestation makes each opponent lose 1 life
8. Huskburster Swarm — When Huskburster Swarm attacks, Fumulus, the Infestation makes each opponent lose 1 life
9. Comet Crawler — When Comet Crawler attacks, Fumulus, the Infestation makes each opponent lose 1 life
10. Buzzard-Wasp Colony — When Buzzard-Wasp Colony attacks, Fumulus, the Infestation makes each opponent lose 1 life

99 other cards cause it too. These are the ones with the most connections.

a Vampire attacks — 267 cards in Fumulus's colors can cause this (Fumulus is one).

When Fumulus, the Infestation attacks:

1. Glass-Cast Heart — makes a token
2. Sanctum Seeker — makes each opponent lose 1 life

a Vampire creature is cast — 267 cards in Fumulus's colors can cause this (Fumulus is one).

1. Bloodlord of Vaasgoth — When Fumulus, the Infestation is cast, Bloodlord of Vaasgoth grants bloodthirst

sacrifice a nontoken creature — 698 cards in Fumulus's colors can cause this.

1. Ayara, First of Locthwain — When you sacrifice another black creature to Ayara, First of Locthwain, Fumulus, the Infestation makes a token
2. Foot Chopper — When a creature is sacrificed thanks to Foot Chopper, Fumulus, the Infestation makes a token
3. Blasting Station — When you sacrifice a creature to Blasting Station, Fumulus, the Infestation makes a token
4. Tainted Aether — When a creature is sacrificed thanks to Tainted Aether, Fumulus, the Infestation makes a token
5. Sporogenic Infection — When a creature is sacrificed thanks to Sporogenic Infection, Fumulus, the Infestation makes a token
6. Blood Funnel — When a creature is sacrificed thanks to Blood Funnel, Fumulus, the Infestation makes a token
7. Rescue from the Underworld — When a creature is sacrificed thanks to Rescue from the Underworld, Fumulus, the Infestation makes a token
8. Come Back Wrong — When a creature is sacrificed thanks to Come Back Wrong, Fumulus, the Infestation makes a token
9. Victimize — When a creature is sacrificed thanks to Victimize, Fumulus, the Infestation makes a token
10. Ruthless Technomancer — When a creature is sacrificed thanks to Ruthless Technomancer, Fumulus, the Infestation makes a token

688 other cards cause it too. These are the ones with the most connections.

life is gained — 642 cards in Fumulus's colors can cause this (Fumulus is one).

When Fumulus, the Infestation gains life:

1. South Wind Avatar — makes each opponent lose 1 life
2. Veinwitch Coven — brings a card back
3. Lich's Mastery — draws you that many cards
4. Wall of Limbs — puts a +1/+1 counter on itself
5. MACH-1, Swooping Scoundrel — surveils
6. Enduring Tenacity — makes each opponent lose life equal to that much
7. Nazar, the Velvet Fang — puts a feeding counter on itself
8. Citizen V, Helmut Zemo — puts a counter on a Villain
9. Bloodbond Vampire — puts a +1/+1 counter on itself
10. Leech Collector // Bloodletting — becomes prepared

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

life is lost — 1,256 cards in Fumulus's colors can cause this (Fumulus is one).

When a permanent makes a player lose life thanks to Fumulus, the Infestation:

1. Hour of Victory — raises your speed
2. Walking Sarcophagus — raises your speed
3. Gas Guzzler — raises your speed
4. Gastal Raider — raises your speed
5. Risen Necroregent — raises your speed
6. The Master of Lake-town — mills a card
7. Starting Column — raises your speed
8. Momentum Breaker — raises your speed
9. Racers' Scoreboard — raises your speed
10. Bloodthirsty Conqueror — gains you that much life

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

a token is created — 726 cards in Fumulus's colors can cause this (Fumulus is one).

When Fumulus, the Infestation makes an Insect token:

1. Idol of Oblivion — draws you 1 card
2. Mirkwood Bats — makes each opponent lose 1 life

a creature attacks — 3,478 cards in Fumulus's colors can cause this (Fumulus is one).

When Fumulus, the Infestation attacks:

1. Adaptive Omnitool — searches a library
2. Chorale of the Void — brings a card back
3. Hooded Blightfang — makes each opponent lose 1 life
4. Staff of Titania — makes a token
5. Inquisitorial Rosette — makes a token
6. Wand of Orcus — grants deathtouch
7. Saw — sacrifices a creature
8. Gisa's Favorite Shovel — makes an opponent sacrifice a creature
9. Ultima Weapon — kills a creature an opponent controls
10. Throwing Knife — sacrifices itself

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

anything attacks — 3,478 cards in Fumulus's colors can cause this (Fumulus is one).

When Fumulus, the Infestation attacks:

1. Grim Javelineer — gives +1/+0
2. ED-E, Lonesome Eyebot — puts a quest counter on itself
3. Fire Navy Trebuchet — makes a token
4. Stensian Sanguinist // Exsanguinate — grants deathtouch
5. Rev, Tithe Extractor — grants deathtouch
6. Boggart Prankster — gives +1/+0
7. Within Range — makes each opponent lose life
8. Curse of Disturbance — makes a token
9. Dawnsire, Sunstar Dreadnought — deals 100 damage
10. Twins of Discord — triggers

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

a creature blocks — 3,478 cards in Fumulus's colors can cause this (Fumulus is one).

When Fumulus, the Infestation blocks:

1. Mage Hunters' Onslaught — makes a player lose 1 life
2. Barrow-Blade — strips abilities
3. Dead-Iron Sledge — kills a creature

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

a creature deals combat damage — 3,478 cards in Fumulus's colors can cause this (Fumulus is one).

1. Hive Mind Coprocessor — When Fumulus, the Infestation deals combat damage, Hive Mind Coprocessor makes you lose life

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

a creature is cast — 3,493 cards in Fumulus's colors can cause this (Fumulus is one).

When Fumulus, the Infestation is cast:

1. Endrek Sahr, Master Breeder — makes that spell's mana value tokens
2. Oketra's Monument — makes a token
3. Bontu's Monument — makes each opponent lose 1 life
4. Vanquisher's Banner — draws you 1 card
5. Rhonas's Monument — gives +2/+2
6. Skittering Horror — sacrifices itself
7. Skittering Skirge — sacrifices itself
8. Skittering Monstrosity — sacrifices itself
9. Hazoret's Monument — draws and discards
10. Kefnet's Monument — triggers

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

a nontoken creature enters the battlefield — 3,680 cards in Fumulus's colors can cause this (Fumulus is one).

1. Minion Reflector — When Fumulus, the Infestation enters, Minion Reflector makes a token