Shriekgeist

a nontoken Spirit deals combat damage — 725 cards in the game can cause this (Shriekgeist is one).

1. Millicent, Restless Revenant — When Shriekgeist deals combat damage, Millicent, Restless Revenant makes a token

a nontoken Spirit enters the battlefield — 727 cards in the game can cause this (Shriekgeist is one).

1. Baboon Spirit — When Shriekgeist enters, Baboon Spirit makes a token

a card is milled — 772 cards in the game can cause this (Shriekgeist is one).

1. Lo and Li, Royal Advisors — When a permanent makes a player mill a card thanks to Shriekgeist, Lo and Li, Royal Advisors puts a counter on an Advisor

a Spirit enters the battlefield — 863 cards in the game can cause this (Shriekgeist is one).

When Shriekgeist enters:

1. Mausoleum Wanderer — gets +1/+1
2. Drogskol Cavalry — gains you 2 life
3. Vanguard of the Restless — returns itself from the graveyard
4. Nebelgast Herald — taps a creature an opponent controls

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

1. Fire Nation Salvagers — Shriekgeist puts cards into the graveyard that Fire Nation Salvagers can bring back
2. Bloodbond March — Shriekgeist puts cards into the graveyard that Bloodbond March can bring back
3. Heart-Shaped Herb — Shriekgeist puts cards into the graveyard that Heart-Shaped Herb can bring back
4. Enlightened Confidant — Shriekgeist puts cards into the graveyard that Enlightened Confidant can bring back
5. Tergrid, God of Fright // Tergrid's Lantern — Shriekgeist puts cards into the graveyard that Tergrid, God of Fright // Tergrid's Lantern can bring back
6. Grazing Kelpie — Shriekgeist puts cards into the graveyard that Grazing Kelpie can bring back
7. Dauthi Voidwalker — Cards Shriekgeist would put into an opponent's graveyard are exiled by Dauthi Voidwalker instead, and it can play from among them
8. Spurnmage Advocate — Shriekgeist puts cards into the graveyard that Spurnmage Advocate can bring back
9. Endurance — Shriekgeist puts cards into the graveyard that Endurance can bring back
10. Merfolk Windrobber — Shriekgeist fills an opponent's graveyard toward the 8 or more cards Merfolk Windrobber needs

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

anything goes to a graveyard — 7,589 cards in the game can cause this (Shriekgeist is one).

When a card hits the graveyard thanks to Shriekgeist:

1. The Haunt of Hightower — puts a +1/+1 counter on itself
2. Duskmantle Guildmage — makes each opponent lose 1 life
3. Vulturous Zombie — puts a +1/+1 counter on itself
4. Bloodchief Ascension — makes each opponent lose 2 life
5. Compost — draws you 1 card
6. Planar Void — hits a graveyard

5 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 (Shriekgeist is one).

When Shriekgeist 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

116 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 (Shriekgeist is one).

When Shriekgeist 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

188 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 (Shriekgeist is one).

When Shriekgeist blocks:

1. Mage Hunters' Onslaught — makes a player lose 1 life
2. Carnage Gladiator — makes a player lose 1 life
3. Tide of War — sacrifices a creature
4. Dead-Iron Sledge — kills a creature
5. Dwindle — kills a creature

25 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 (Shriekgeist is one).

1. Mardu Ascendancy — When Shriekgeist attacks, Mardu Ascendancy makes a token

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

a nontoken creature enters the battlefield — 18,448 cards in the game can cause this (Shriekgeist is one).

1. Samwise Gamgee — When Shriekgeist enters, Samwise Gamgee makes a token

32 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 (Shriekgeist is one).

When Shriekgeist enters:

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

342 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 (Shriekgeist is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When Shriekgeist enters, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself

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