Necrosquito

an Insect attacks — 323 cards in the game can cause this (Necrosquito is one).

When Necrosquito attacks:

1. Vrestin, Menoptra Leader — puts a counter on a permanent
2. Fumulus, the Infestation — makes each opponent lose 1 life

a Phyrexian attacks — 495 cards in the game can cause this (Necrosquito is one).

1. Vulpine Harvester — When Necrosquito attacks, Vulpine Harvester brings a card back

a nontoken Phyrexian enters the battlefield — 496 cards in the game can cause this (Necrosquito is one).

1. Darksteel Splicer — When Necrosquito enters, Darksteel Splicer makes a token

a Phyrexian enters the battlefield — 524 cards in the game can cause this (Necrosquito is one).

1. Essence of Orthodoxy — When Necrosquito enters, Essence of Orthodoxy puts a counter on a permanent

an artifact is put into a graveyard from the battlefield — 1,254 cards in the game can cause this.

1. Straw Golem — When Straw Golem dies, Necrosquito puts a oil counter on itself
2. Fire Navy Trebuchet — When a Construct dies thanks to Fire Navy Trebuchet, Necrosquito puts a oil counter on itself
3. Heart-Shaped Herb — When a creature dies thanks to Heart-Shaped Herb, Necrosquito puts a oil counter on itself
4. Ruthless Technomancer — When a creature dies thanks to Ruthless Technomancer, Necrosquito puts a oil counter on itself
5. Trading Post — When you sacrifice a creature to Trading Post, Necrosquito puts a oil counter on itself
6. Sivriss, Nightmare Speaker — When you sacrifice another creature or an artifact to Sivriss, Nightmare Speaker, Necrosquito puts a oil counter on itself
7. Fain, the Broker — When you sacrifice a creature to Fain, the Broker, Necrosquito puts a oil counter on itself
8. Scrounge for Eternity — When a creature dies thanks to Scrounge for Eternity, Necrosquito puts a oil counter on itself
9. Extruder — When Extruder dies, Necrosquito puts a oil counter on itself
10. Acidic Dagger — When a creature dies thanks to Acidic Dagger, Necrosquito puts a oil counter on itself

1,244 other cards cause it too. These are the ones with the most connections.

a creature gets a counter — 2,691 cards in the game can cause this (Necrosquito is one).

When Necrosquito gets a counter:

1. Hollowmurk Siege — draws you 1 card
2. Generous Patron — draws you 1 card
3. Danny Pink — draws you 1 card
4. Bold Plagiarist — puts counters on a permanent
5. Mikey & Leo, Chaos & Order — draws you 1 card
6. Kros, Defense Contractor — triggers
7. Rikku, Resourceful Guardian — triggers

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

anything gets a counter — 4,415 cards in the game can cause this (Necrosquito is one).

1. All Will Be One — When Necrosquito gets a counter, All Will Be One deals that much damage

8 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 (Necrosquito is one).

When Necrosquito attacks:

1. Far Fortune, End Boss — deals 1 damage
2. Temmet, Naktamun's Will — draws you 1 card
3. Grim Javelineer — gives +1/+0
4. Invisible Woman — triggers
5. Caesar, Legion's Emperor — sacrifices a creature
6. Guide of Souls — triggers
7. Campsite Cuisine — sacrifices a Food
8. Gossip's Talent — triggers
9. Banon, the Returners' Leader — draws and discards
10. Toph, Earthbending Master — puts a counter on a permanent

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 (Necrosquito is one).

When Necrosquito attacks:

1. Adaptive Omnitool — searches a library
2. Anthem of Rakdos — gives +2/+0
3. Kindred Discovery — draws you 1 card
4. Invasion of New Capenna // Holy Frazzle-Cannon — puts counters on a permanent
5. Chorale of the Void — brings a card back
6. Anim Pakal, Thousandth Moon — puts a +1/+1 counter on itself
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. Total War — kills a creature

180 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 (Necrosquito is one).

When Necrosquito blocks:

1. Mage Hunters' Onslaught — makes a player lose 1 life
2. Carnage Gladiator — makes a player lose 1 life
3. Barrow-Blade — strips abilities
4. Heat of Battle — deals 1 damage
5. Battle Strain — deals 1 damage
6. Favor of the Woods — gains you 3 life
7. Tide of War — sacrifices a creature
8. Dead-Iron Sledge — kills a creature
9. Dwindle — kills a creature
10. 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 (Necrosquito is one).

When Necrosquito 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 (Necrosquito is one).

When Necrosquito attacks:

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

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

When Necrosquito enters:

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

304 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 (Necrosquito is one).

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

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