Festerleech

a Zombie deals combat damage — 657 cards in the game can cause this (Festerleech is one).

1. Undead Alchemist — When Festerleech deals combat damage, Undead Alchemist mills a card

a Zombie attacks — 657 cards in the game can cause this (Festerleech is one).

1. Varina, Lich Queen — When Festerleech attacks, Varina, Lich Queen draws you that many cards

a nontoken Zombie enters the battlefield — 661 cards in the game can cause this (Festerleech is one).

1. Necroduality — When Festerleech enters, Necroduality makes a token

a Zombie enters the battlefield — 795 cards in the game can cause this (Festerleech is one).

When Festerleech enters:

1. Noxious Ghoul — shrinks a creature by -1/-1
2. Geralf, the Fleshwright — puts counters on a permanent
3. Wayward Servant — makes each opponent lose 1 life
4. Champion of the Perished — puts a +1/+1 counter on itself
5. Mummy Paramount — gets +1/+1
6. Unconventional Tactics — returns itself from the graveyard
7. Binding Mummy — taps a creature or artifact

a card in a graveyard — 7,589 cards in the game can cause this (Festerleech is one).

1. Samwise Gamgee — Festerleech puts cards into the graveyard that Samwise Gamgee can bring back
2. Bloodbond March — Festerleech puts cards into the graveyard that Bloodbond March can bring back
3. Thor, God of Thunder — Festerleech puts cards into the graveyard that Thor, God of Thunder can bring back
4. Gale, Waterdeep Prodigy — Festerleech puts cards into the graveyard that Gale, Waterdeep Prodigy can bring back
5. Harness the Storm — Festerleech puts cards into the graveyard that Harness the Storm can bring back
6. Transplant Theorist — Festerleech puts cards into the graveyard that Transplant Theorist can bring back
7. Heart-Shaped Herb — Festerleech puts cards into the graveyard that Heart-Shaped Herb can bring back
8. Wayward Angel — Festerleech fills your graveyard toward the 7 or more cards Wayward Angel needs
9. Rescue from the Underworld — Festerleech puts cards into the graveyard that Rescue from the Underworld can bring back
10. Victimize — Festerleech puts cards into the graveyard that Victimize can bring back

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

anything goes to a graveyard — 7,589 cards in the game can cause this (Festerleech is one).

When a card hits the graveyard thanks to Festerleech:

1. Quest for Ancient Secrets — puts a quest counter on itself
2. Planar Void — hits a graveyard
3. Measure of Wickedness — gives an opponent control of itself
4. Energy Field — sacrifices itself

7 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 (Festerleech is one).

When Festerleech 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

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 (Festerleech is one).

When Festerleech 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

188 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 (Festerleech is one).

When Festerleech blocks:

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

25 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 (Festerleech is one).

1. Mardu Ascendancy — When Festerleech attacks, Mardu Ascendancy makes a token

2 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 (Festerleech is one).

When Festerleech enters:

1. Slash, Reptile Rampager — deals 2 damage
2. Ray Fillet, Wave Warrior — puts a counter on itself
3. Bess, Soul Nourisher — puts a +1/+1 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

342 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 (Festerleech is one).

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

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