Flumph

a card is drawn — 3,815 cards in the game can cause this (Flumph is one).

1. Temmet, Naktamun's Will — When Flumph makes a player draw a card, Temmet, Naktamun's Will gives +1/+1
2. Niv-Mizzet, Parun — When Flumph makes a player draw a card, Niv-Mizzet, Parun deals 1 damage
3. Aether Syphon — When Flumph makes a player draw a card, Aether Syphon mills a card
4. Ob Nixilis, the Hate-Twisted — When a permanent makes a player draw a card thanks to Flumph, Ob Nixilis, the Hate-Twisted deals 1 damage
5. The Locust God — When Flumph makes a player draw a card, The Locust God makes a token
6. Starving Revenant — When Flumph makes a player draw a card, Starving Revenant makes each opponent lose 1 life
7. Diviner's Wand — When Flumph makes a player draw a card, Diviner's Wand gets +1/+1
8. Ominous Seas — When Flumph makes a player draw a card, Ominous Seas puts a foreshadow counter on itself
9. Dream Trawler — When Flumph makes a player draw a card, Dream Trawler gets +1/+0
10. Orcish Bowmasters — When a permanent makes a player draw a card thanks to Flumph, Orcish Bowmasters deals 1 damage

57 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 (Flumph is one).

1. Far Fortune, End Boss — When Flumph attacks, Far Fortune, End Boss deals 1 damage
2. Grim Javelineer — When Flumph attacks, Grim Javelineer gives +1/+0
3. Invisible Woman — When Flumph attacks, Invisible Woman triggers
4. Caesar, Legion's Emperor — When Flumph attacks, Caesar, Legion's Emperor sacrifices a creature
5. Guide of Souls — When Flumph attacks, Guide of Souls triggers
6. Campsite Cuisine — When Flumph attacks, Campsite Cuisine sacrifices a Food
7. Gossip's Talent — When Flumph attacks, Gossip's Talent triggers
8. Banon, the Returners' Leader — When Flumph attacks, Banon, the Returners' Leader draws and discards
9. Toph, Earthbending Master — When Flumph attacks, Toph, Earthbending Master puts a counter on a permanent
10. Three Dog, Galaxy News DJ — When Flumph attacks, Three Dog, Galaxy News DJ sacrifices an Aura

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

a creature attacks — 17,934 cards in the game can cause this (Flumph is one).

1. Adaptive Omnitool — When Flumph attacks, Adaptive Omnitool searches a library
2. Anthem of Rakdos — When Flumph attacks, Anthem of Rakdos gives +2/+0
3. Kindred Discovery — When Flumph attacks, Kindred Discovery draws you 1 card
4. Invasion of New Capenna // Holy Frazzle-Cannon — When Flumph attacks, Invasion of New Capenna // Holy Frazzle-Cannon puts counters on a permanent
5. Chorale of the Void — When Flumph attacks, Chorale of the Void brings a card back
6. Anim Pakal, Thousandth Moon — When Flumph attacks, Anim Pakal, Thousandth Moon puts a +1/+1 counter on itself
7. Saw — When Flumph attacks, Saw sacrifices a creature
8. Gisa's Favorite Shovel — When Flumph attacks, Gisa's Favorite Shovel makes an opponent sacrifice a creature
9. Ultima Weapon — When Flumph attacks, Ultima Weapon kills a creature an opponent controls
10. Total War — When Flumph attacks, Total War kills a creature

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

a creature blocks — 17,934 cards in the game can cause this (Flumph is one).

1. Mage Hunters' Onslaught — When Flumph blocks, Mage Hunters' Onslaught makes a player lose 1 life
2. Carnage Gladiator — When Flumph blocks, Carnage Gladiator makes a player lose 1 life
3. Perimeter Captain — When Flumph blocks, Perimeter Captain gains you 2 life
4. Barrow-Blade — When Flumph blocks, Barrow-Blade strips abilities
5. Heat of Battle — When Flumph blocks, Heat of Battle deals 1 damage
6. Battle Strain — When Flumph blocks, Battle Strain deals 1 damage
7. Tide of War — When Flumph blocks, Tide of War sacrifices a creature
8. Dead-Iron Sledge — When Flumph blocks, Dead-Iron Sledge kills a creature
9. Dwindle — When Flumph blocks, Dwindle kills a creature
10. Shield of the Righteous — When Flumph blocks, Shield of the Righteous triggers

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

a creature deals combat damage — 17,934 cards in the game can cause this (Flumph is one).

When Flumph deals combat damage:

1. Primo, the Unbounded — makes a token
2. Locutus of Borg — makes a token
3. Antagonist Incorporator — makes a token
4. Hive Mind Coprocessor — makes you lose life

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

a nontoken creature attacks — 17,934 cards in the game can cause this (Flumph is one).

1. Mardu Ascendancy — When Flumph attacks, Mardu Ascendancy makes a token
2. Basri Ket — When Flumph attacks, Basri Ket makes a token
3. Militia's Pride — When Flumph attacks, Militia's Pride makes a token

a creature enters the battlefield — 19,800 cards in the game can cause this (Flumph is one).

1. Slash, Reptile Rampager — When Flumph enters, Slash, Reptile Rampager deals 2 damage
2. Ray Fillet, Wave Warrior — When Flumph enters, Ray Fillet, Wave Warrior puts a counter on itself
3. The Neutrinos — When Flumph enters, The Neutrinos gets +1/+0
4. Wingnut, Bat on the Belfry — When Flumph enters, Wingnut, Bat on the Belfry grants flying, haste and menace
5. Aetherstorm Roc — When Flumph enters, Aetherstorm Roc puts a counter on a permanent you control
6. Raphael, Most Attitude — When Flumph enters, Raphael, Most Attitude exiles a card from your library

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

anything enters the battlefield — 26,499 cards in the game can cause this (Flumph is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When Flumph enters, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself

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