The Blue Spirit

an Ally enters the battlefield — 43 cards in The Blue Spirit's colors can cause this (The Blue Spirit is one).

When The Blue Spirit enters:

1. Halimar Excavator — mills a card
2. Umara Raptor — puts a +1/+1 counter on itself
3. Seascape Aerialist — grants flying

a Rogue creature enters the battlefield — 170 cards in The Blue Spirit's colors can cause this (The Blue Spirit is one).

1. Cloak and Dagger — When The Blue Spirit enters, Cloak and Dagger triggers

a card is drawn — 1,454 cards in The Blue Spirit's colors can cause this (The Blue Spirit is one).

When The Blue Spirit makes a player draw a card:

1. Aether Syphon — mills a card
2. Diviner's Wand — gets +1/+1
3. Ominous Seas — puts a foreshadow counter on itself
4. Iron Man, Armored Avenger — puts a counter on a creature
5. Psychosis Crawler — makes each opponent lose 1 life
6. Lyla, Holographic Assistant — puts a counter on a creature
7. Data, New Life — puts a +1/+1 counter on itself
8. Chasm Skulker — puts a +1/+1 counter on itself
9. Nadir Kraken — puts a +1/+1 counter on itself
10. Teferi, Temporal Pilgrim — puts a loyalty counter on itself

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

a Human enters the battlefield — 634 cards in The Blue Spirit's colors can cause this (The Blue Spirit is one).

1. Captain of the Mists — When The Blue Spirit enters, Captain of the Mists untaps itself

a creature attacks — 3,238 cards in The Blue Spirit's colors can cause this (The Blue Spirit is one).

When The Blue Spirit attacks:

1. Adaptive Omnitool — searches a library
2. Kindred Discovery — draws you 1 card
3. Screaming Swarm — mills a card
4. Imperious Mindbreaker — mills a card
5. Staff of Titania — makes a token
6. Inquisitorial Rosette — makes a token
7. Andúril, Flame of the West — makes 2 tokens
8. Saw — sacrifices a creature
9. Ultima Weapon — kills a creature an opponent controls
10. Throwing Knife — sacrifices itself

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

anything attacks — 3,238 cards in The Blue Spirit's colors can cause this (The Blue Spirit is one).

When The Blue Spirit attacks:

1. ED-E, Lonesome Eyebot — puts a quest counter on itself
2. Madame Web, Clairvoyant — mills a card
3. Dawnsire, Sunstar Dreadnought — deals 100 damage
4. Curse of Verbosity — draws you 1 card
5. Gossip's Talent — triggers
6. Alora, Merry Thief — triggers
7. Twins of Discord — triggers
8. Great Gilded Boat — draws and discards
9. Cosmic Cube — triggers
10. Doom's Time Platform — exiles a card from your graveyard

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

a creature blocks — 3,238 cards in The Blue Spirit's colors can cause this (The Blue Spirit is one).

When The Blue Spirit blocks:

1. Barrow-Blade — strips abilities
2. Dead-Iron Sledge — kills a creature
3. Dwindle — kills a creature

1 other card cares about it too. These are the ones with the most connections.

a creature is cast — 3,254 cards in The Blue Spirit's colors can cause this (The Blue Spirit is one).

When The Blue Spirit is cast:

1. Oketra's Monument — makes a token
2. Kozilek's Unsealing — makes 2 tokens
3. The Clone Saga — copies a spell
4. Customs Depot — draws you 1 card
5. Bontu's Monument — makes each opponent lose 1 life
6. Vanquisher's Banner — draws you 1 card
7. Rhonas's Monument — gives +2/+2
8. Hazoret's Monument — draws and discards
9. Aether Barrier — makes a player sacrifice a permanent
10. Kefnet's Monument — triggers

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

a nontoken creature enters the battlefield — 3,316 cards in The Blue Spirit's colors can cause this (The Blue Spirit is one).

When The Blue Spirit enters:

1. Arni, Humble Scribe — untaps itself
2. Minion Reflector — makes a token
3. Overburden — triggers

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

a creature enters the battlefield — 3,581 cards in The Blue Spirit's colors can cause this (The Blue Spirit is one).

When The Blue Spirit enters:

1. Ray Fillet, Wave Warrior — puts a counter on itself
2. Pollywog Prodigy — puts a counter on itself
3. Blasting Station — untaps itself
4. Bloodline Pretender — puts a +1/+1 counter on itself
5. Sage's Row Denizen — mills a card
6. Soultether Golem — puts a time counter on itself
7. Simic Fluxmage — puts a counter on itself
8. Simic Manipulator — puts a counter on itself
9. Monkey Cage — sacrifices itself

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