Leech Collector // Bloodletting

gain life — 2,076 cards in the game can cause this.

1. Massacre Girl, Most Wanted — When Massacre Girl, Most Wanted gains life, Leech Collector // Bloodletting becomes prepared
2. Ayara, First of Locthwain — When Ayara, First of Locthwain gains life, Leech Collector // Bloodletting becomes prepared
3. Angelheart Vial — When Angelheart Vial gains life, Leech Collector // Bloodletting becomes prepared
4. Sun Droplet — When Sun Droplet gains life, Leech Collector // Bloodletting becomes prepared
5. Trespasser's Curse — When Trespasser's Curse gains life, Leech Collector // Bloodletting becomes prepared
6. Sword of Light and Shadow — When Sword of Light and Shadow gains life, Leech Collector // Bloodletting becomes prepared
7. Elegy Acolyte — When Elegy Acolyte gains life, Leech Collector // Bloodletting becomes prepared
8. Hooded Blightfang — When Hooded Blightfang gains life, Leech Collector // Bloodletting becomes prepared
9. Bio-Asset Allocator — When Bio-Asset Allocator gains life, Leech Collector // Bloodletting becomes prepared
10. Stensian Sanguinist // Exsanguinate — When Stensian Sanguinist // Exsanguinate gains life, Leech Collector // Bloodletting becomes prepared

2,066 other cards cause it too. These are the ones with the most connections.

life is lost — 3,160 cards in the game can cause this (Leech Collector is one).

When a permanent makes a player lose life thanks to Leech Collector // Bloodletting:

1. Far Fortune, End Boss — raises your speed
2. Zahur, Glory's Past — raises your speed
3. Mendicant Core, Guidelight — raises your speed
4. Aether Syphon — raises your speed
5. Vnwxt, Verbose Host — raises your speed
6. Embalmed Ascendant — raises your speed
7. Slick Imitator — raises your speed
8. Nesting Bot — raises your speed
9. Howlsquad Heavy — raises your speed
10. Hour of Victory — raises your speed

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

a sorcery is cast — 3,720 cards in the game can cause this (Leech Collector is one).

When Leech Collector // Bloodletting is cast:

1. Spellweaver Volute — copies a spell
2. Lilah, Undefeated Slickshot — gets +1/+1
3. Niblis of Frost — gets +1/+1
4. Primeval Bounty — puts 3 counters on a creature
5. Tetsuko Umezawa, Pursuer — gets +1/+1
6. Thor, God of Thunder — deals that spell's mana value damage
7. Krile Baldesion — brings a card back
8. Summon: Good King Mog XII — makes a token
9. Kykar, Wind's Fury — makes a token
10. Blood Funnel — sacrifices a creature

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

a Human enters the battlefield — 4,639 cards in the game can cause this (Leech Collector is one).

When Leech Collector // Bloodletting enters:

1. General Kudro of Drannith — hits a graveyard
2. Heronblade Elite — puts a +1/+1 counter on itself
3. Kyler, Sigardian Emissary — puts a +1/+1 counter on itself
4. Thalia's Lieutenant — puts a +1/+1 counter on itself
5. Champion of the Parish — puts a +1/+1 counter on itself
6. Captain of the Mists — untaps itself
7. Erkenbrand, Lord of Westfold — gives +1/+0
8. Beregond of the Guard — gives +1/+1
9. Théoden, King of Rohan — grants double strike
10. Lossarnach Captain — taps a creature an opponent controls

2 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 (Leech Collector is one).

When Leech Collector // Bloodletting attacks:

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

116 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 (Leech Collector is one).

When Leech Collector // Bloodletting 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. Saw — sacrifices a creature
7. Gisa's Favorite Shovel — makes an opponent sacrifice a creature
8. Ultima Weapon — kills a creature an opponent controls

187 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 (Leech Collector is one).

When Leech Collector // Bloodletting blocks:

1. Mage Hunters' Onslaught — makes a player lose 1 life
2. Tide of War — sacrifices a creature
3. Dead-Iron Sledge — kills a creature

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

a nontoken creature enters the battlefield — 18,448 cards in the game can cause this (Leech Collector is one).

1. Riku of Two Reflections — When Leech Collector // Bloodletting enters, Riku of Two Reflections makes a token

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

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

When Leech Collector // Bloodletting enters:

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

320 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 (Leech Collector is one).

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

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