Courier Bat

a Bat attacks — 103 cards in the game can cause this (Courier Bat is one).

1. Zoraline, Cosmos Caller — When Courier Bat attacks, Zoraline, Cosmos Caller gains you 1 life

a creature leaves a graveyard — 1,302 cards in the game can cause this (Courier Bat is one).

When Courier Bat leaves a graveyard:

1. Grim Reaper's Scythe — makes a token
2. Syr Konrad, the Grim — deals 1 damage
3. Cyan, Vengeful Samurai — puts a +1/+1 counter on itself
4. Along the Crooked Way — puts a counter on a Goblin or Army
5. Skeleton Crew — makes a token
6. Desecrated Tomb — makes a token
7. Chalk Outline — makes a token
8. Insidious Roots — makes a token
9. Undead Hand Ninja — makes each opponent lose 1 life
10. Rot Farm Mortipede — gets +1/+0

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

anything leaves a graveyard — 2,503 cards in the game can cause this (Courier Bat is one).

When Courier Bat leaves a graveyard:

1. Blastoneuron — makes each opponent lose 1 life
2. Defiled Crypt // Cadaver Lab — makes a token
3. Teval, the Balanced Scale — makes a token
4. Hologram Stalker — makes a token
5. Tormod, the Desecrator — makes a token
6. Quintorius, Field Historian — makes a token
7. Garrison Excavator — makes a token
8. Amzu, Swarm's Hunger — makes a token
9. Kirol, History Buff // Pack a Punch — becomes prepared
10. Teval's Judgment — triggers

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

put a creature into a graveyard — 2,769 cards in the game can cause this.

1. Shriveling Rot — Shriveling Rot puts cards into the graveyard that Courier Bat can bring back
2. Foot Chopper — Foot Chopper puts cards into the graveyard that Courier Bat can bring back
3. Blasting Station — Blasting Station puts cards into the graveyard that Courier Bat can bring back
4. Spreading Plague — Spreading Plague puts cards into the graveyard that Courier Bat can bring back
5. Hot Soup — Hot Soup puts cards into the graveyard that Courier Bat can bring back
6. Cracked Skull — Cracked Skull puts cards into the graveyard that Courier Bat can bring back
7. Sporogenic Infection — Sporogenic Infection puts cards into the graveyard that Courier Bat can bring back
8. Mire Blight — Mire Blight puts cards into the graveyard that Courier Bat can bring back
9. Death Pits of Rath — Death Pits of Rath puts cards into the graveyard that Courier Bat can bring back
10. Endrek Sahr, Master Breeder — When Endrek Sahr, Master Breeder is in the graveyard, Courier Bat can bring it back

2,759 other cards cause it too. These are the ones with the most connections.

anything attacks — 17,934 cards in the game can cause this (Courier Bat is one).

When Courier Bat 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 (Courier Bat is one).

When Courier Bat 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 (Courier Bat is one).

When Courier Bat 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. Tide of War — sacrifices a creature
7. Dead-Iron Sledge — kills a creature
8. Dwindle — kills a creature
9. Shield of the Righteous — triggers

19 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 (Courier Bat is one).

When Courier Bat 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 (Courier Bat is one).

When Courier Bat enters:

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

303 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 (Courier Bat is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When Courier Bat 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.