Svyelun of Sea and Sky

a God attacks — 125 cards in the game can cause this (Svyelun of Sea and Sky is one).

1. Kratos, Stoic Father — When Svyelun of Sea and Sky attacks, Kratos, Stoic Father puts a counter on a permanent

a Merfolk deals combat damage — 386 cards in the game 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 — 397 cards in the game can cause this (Svyelun of Sea and Sky is one).

When Svyelun of Sea and Sky enters:

1. Forerunner of the Heralds — puts a +1/+1 counter on itself
2. Deeproot Elite — puts a counter on a Merfolk
3. River Sneak — gets +1/+1

a Merfolk you control — 399 cards in the game 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 Mystic — Umara Mystic counts toward the 2 or more Merfolk Svyelun of Sea and Sky needs
3. Sage of the Falls — Sage of the Falls counts toward the 2 or more Merfolk Svyelun of Sea and Sky needs

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

a card is drawn — 3,815 cards in the game can cause this (Svyelun of Sea and Sky is one).

When Svyelun of Sea and Sky makes a player draw a card:

1. Temmet, Naktamun's Will — gives +1/+1
2. Niv-Mizzet, Parun — deals 1 damage
3. Aether Syphon — mills a card
4. The Locust God — makes a token
5. Starving Revenant — makes each opponent lose 1 life
6. Diviner's Wand — gets +1/+1
7. Ominous Seas — puts a foreshadow counter on itself
8. Dream Trawler — gets +1/+0
9. Iron Man, Armored Avenger — puts a counter on a creature
10. The Astonishing Ant-Man — puts a +1/+1 counter on itself

57 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 (Svyelun of Sea and Sky is one).

When Svyelun of Sea and Sky attacks:

1. Far Fortune, End Boss — deals 1 damage
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

115 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 (Svyelun of Sea and Sky is one).

When Svyelun of Sea and Sky 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

191 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 (Svyelun of Sea and Sky is one).

When Svyelun of Sea and Sky 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. Favor of the Woods — gains you 3 life
7. Tide of War — sacrifices a creature
8. Dead-Iron Sledge — kills a creature
9. Dwindle — kills a creature
10. Shield of the Righteous — triggers

21 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 (Svyelun of Sea and Sky is one).

When Svyelun of Sea and Sky 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 (Svyelun of Sea and Sky is one).

When Svyelun of Sea and Sky enters:

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

381 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 (Svyelun of Sea and Sky is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When Svyelun of Sea and Sky enters, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself

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