Svyelun of Sea and Sky

a Merfolk deals combat damage — 239 cards in Svyelun of Sea and Sky's colors can cause this (Svyelun of Sea and Sky is one).

1. Seafloor Oracle — When Svyelun of Sea and Sky deals combat damage, Seafloor Oracle draws you 1 card

a Merfolk enters the battlefield — 247 cards in Svyelun of Sea and Sky's colors can cause this (Svyelun of Sea and Sky is one).

1. River Sneak — When Svyelun of Sea and Sky enters, River Sneak gets +1/+1

a Merfolk you control — 245 cards in Svyelun of Sea and Sky's colors can cause this (Svyelun of Sea and Sky is one).

1. Umara Wizard // Umara Skyfalls — Umara Wizard // Umara Skyfalls counts toward the 2 or more Merfolk Svyelun of Sea and Sky needs
2. Umara Entangler — Umara Entangler counts toward the 2 or more Merfolk Svyelun of Sea and Sky needs

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

a card is drawn — 1,454 cards in Svyelun of Sea and Sky's colors can cause this (Svyelun of Sea and Sky is one).

When Svyelun of Sea and Sky 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 creature attacks — 3,238 cards in Svyelun of Sea and Sky's colors can cause this (Svyelun of Sea and Sky is one).

When Svyelun of Sea and Sky 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

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

anything attacks — 3,238 cards in Svyelun of Sea and Sky's colors can cause this (Svyelun of Sea and Sky is one).

When Svyelun of Sea and Sky 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

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

a creature blocks — 3,238 cards in Svyelun of Sea and Sky's colors can cause this (Svyelun of Sea and Sky is one).

When Svyelun of Sea and Sky blocks:

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

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

a creature is cast — 3,254 cards in Svyelun of Sea and Sky's colors can cause this (Svyelun of Sea and Sky is one).

When Svyelun of Sea and Sky is cast:

1. Oketra's Monument — makes a token
2. The Clone Saga — copies a spell
3. Customs Depot — draws you 1 card
4. Bontu's Monument — makes each opponent lose 1 life
5. Vanquisher's Banner — draws you 1 card
6. Rhonas's Monument — gives +2/+2
7. Hazoret's Monument — draws and discards
8. Aether Barrier — makes a player sacrifice a permanent
9. Kefnet's Monument — triggers
10. Equilibrium — 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 Svyelun of Sea and Sky's colors can cause this (Svyelun of Sea and Sky is one).

When Svyelun of Sea and Sky 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 Svyelun of Sea and Sky's colors can cause this (Svyelun of Sea and Sky is one).

When Svyelun of Sea and Sky 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. Sage of the Falls — draws you 1 card
5. Bloodline Pretender — puts a +1/+1 counter on itself
6. Sage's Row Denizen — mills a card
7. Soultether Golem — puts a time counter on itself
8. Simic Fluxmage — puts a counter on itself
9. Simic Manipulator — puts a counter on itself
10. Monkey Cage — sacrifices itself

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