Seasinger

a Merfolk in a graveyard — 13 cards in the game can cause this (Seasinger is one).

1. Grim Captain's Call — When Seasinger is in the graveyard, Grim Captain's Call can bring it back

a Merfolk deals combat damage — 386 cards in the game can cause this (Seasinger is one).

1. Seafloor Oracle — When Seasinger deals combat damage, Seafloor Oracle draws you 1 card

a Merfolk enters the battlefield — 397 cards in the game can cause this (Seasinger is one).

When Seasinger 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 creature untaps — 519 cards in the game can cause this (Seasinger is one).

1. Fishing Pole — When Seasinger untaps, Fishing Pole triggers

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

a nontoken creature is sacrificed — 1,714 cards in the game can cause this (Seasinger is one).

When you sacrifice Seasinger:

1. Fumulus, the Infestation — makes a token
2. Bag of Devouring — exiles it

a creature is sacrificed — 1,741 cards in the game can cause this (Seasinger is one).

When you sacrifice Seasinger:

1. Ziatora, the Incinerator — deals that creature's power damage
2. Dina, Essence Brewer — draws you 1 card
3. Fleshtaker — gains you 1 life
4. Body Dropper — puts a +1/+1 counter on itself
5. Smothering Abomination — draws you 1 card
6. Kels, Fight Fixer — draws you 1 card
7. Caesar, Legion's Emperor — triggers
8. Grist, the Hunger Tide — kills a creature or planeswalker an opponent controls
9. Cabal Therapist — triggers
10. Rakdos, the Muscle — exiles a card from an opponent's library

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

a creature in a graveyard — 2,769 cards in the game can cause this (Seasinger is one).

When Seasinger is in the graveyard:

1. Chainer, Dementia Master — can bring it back
2. Coffin Queen — can bring it back
3. Havengul Lich — can bring it back
4. Liliana the Repentant — can bring it back
5. Paleoloth — can bring it back
6. Chainer, Nightmare Adept — can bring it back
7. Banon, the Returners' Leader — can bring it back
8. Surgical Suite // Hospital Room — can bring it back
9. Sword of Light and Shadow — can bring it back
10. Necromantic Thirst — can bring it back

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

a nontoken creature dies — 2,769 cards in the game can cause this (Seasinger is one).

1. Zahur, Glory's Past — When Seasinger dies, Zahur, Glory's Past makes a token
2. Liesa, Forgotten Archangel — When Seasinger dies, Liesa, Forgotten Archangel brings a card back
3. Avacyn, Angel of Horror — When Seasinger dies, Avacyn, Angel of Horror brings a card back
4. Yedora, Grave Gardener — When Seasinger dies, Yedora, Grave Gardener brings a card back
5. Nim Deathmantle — When Seasinger dies, Nim Deathmantle brings a card back
6. Valkyrie's Call — When Seasinger dies, Valkyrie's Call brings a card back
7. Decaying Soil — When Seasinger dies, Decaying Soil brings a card back
8. High-Society Hunter — When Seasinger dies, High-Society Hunter draws you 1 card
9. Liliana, Heretical Healer // Liliana, Defiant Necromancer — When Seasinger dies, Liliana, Heretical Healer // Liliana, Defiant Necromancer flickers itself
10. Body Launderer — When Seasinger dies, Body Launderer draws and discards

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

a creature dies — 2,830 cards in the game can cause this (Seasinger is one).

1. Pious Evangel // Wayward Disciple — When Seasinger dies, Pious Evangel // Wayward Disciple makes each opponent lose 1 life
2. Daxos, Blessed by the Sun — When Seasinger dies, Daxos, Blessed by the Sun gains you 1 life
3. Elas il-Kor, Sadistic Pilgrim — When Seasinger dies, Elas il-Kor, Sadistic Pilgrim makes each opponent lose 1 life
4. Shriveling Rot — When Seasinger dies, Shriveling Rot makes a player lose life equal to its toughness
5. Meathook Massacre II — When Seasinger dies, Meathook Massacre II brings a card back
6. Ashnod's Intervention — When Seasinger dies, Ashnod's Intervention brings a card back
7. Saffi Eriksdotter — When Seasinger dies, Saffi Eriksdotter sacrifices itself
8. Angelic Renewal — When Seasinger dies, Angelic Renewal sacrifices itself

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

a creature leaves the battlefield — 4,238 cards in the game can cause this (Seasinger is one).

1. Ninja Teen — When Seasinger leaves the battlefield, Ninja Teen makes each opponent lose 1 life

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

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

1. Havi, the All-Father — Seasinger fills your graveyard toward the 4 or more cards Havi, the All-Father needs
2. Repentant Vampire — Seasinger fills your graveyard toward the 7 or more cards Repentant Vampire needs
3. Treacherous Vampire — Seasinger fills your graveyard toward the 7 or more cards Treacherous Vampire needs
4. Athreos, Shroud-Veiled — When Seasinger is in the graveyard, Athreos, Shroud-Veiled can bring it back

440 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 (Seasinger is one).

When Seasinger attacks:

1. Shaun, Father of Synths — makes a token
2. Grim Javelineer — gives +1/+0
3. Clavileño, First of the Blessed — turns something into a creature

147 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 (Seasinger is one).

1. Chorale of the Void — When Seasinger attacks, Chorale of the Void brings a card back

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

a creature is cast — 18,010 cards in the game can cause this (Seasinger is one).

1. Quirion Beastcaller — When Seasinger is cast, Quirion Beastcaller puts a +1/+1 counter on itself

90 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 (Seasinger is one).

1. Boss's Chauffeur — When Seasinger enters, Boss's Chauffeur puts a +1/+1 counter on itself

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