Shocker

an Insect attacks — 323 cards in the game can cause this (Shocker is one).

When Shocker attacks:

1. Vrestin, Menoptra Leader — puts a counter on a permanent
2. Fumulus, the Infestation — makes each opponent lose 1 life

a card is discarded — 2,042 cards in the game can cause this (Shocker is one).

When a permanent makes a player discard a card thanks to Shocker:

1. Sangromancer — gains you 3 life
2. Lo and Li, Royal Advisors — puts a counter on an Advisor
3. Nath of the Gilt-Leaf — makes a token
4. Tourach, Dread Cantor — puts a +1/+1 counter on itself
5. Tinybones, Pocket Nuisance — deals 1 damage
6. Tinybones, Bauble Burglar — hits a graveyard
7. Fell Specter — makes each opponent lose 2 life
8. Spirit Cairn — makes a token
9. Confessor — gains you 1 life
10. Hostile Investigator — triggers

51 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 (Shocker is one).

When Shocker 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. Ob Nixilis, the Hate-Twisted — deals 1 damage
5. The Locust God — makes a token
6. Starving Revenant — makes each opponent lose 1 life
7. Diviner's Wand — gets +1/+1
8. Ominous Seas — puts a foreshadow counter on itself
9. Dream Trawler — gets +1/+0
10. Orcish Bowmasters — deals 1 damage

57 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 (Shocker is one).

1. Bloodbond March — Shocker puts cards into the graveyard that Bloodbond March can bring back
2. Heart-Shaped Herb — Shocker puts cards into the graveyard that Heart-Shaped Herb can bring back
3. Enlightened Confidant — Shocker puts cards into the graveyard that Enlightened Confidant can bring back
4. Tergrid, God of Fright // Tergrid's Lantern — Shocker puts cards into the graveyard that Tergrid, God of Fright // Tergrid's Lantern can bring back
5. Grazing Kelpie — Shocker puts cards into the graveyard that Grazing Kelpie can bring back
6. Dauthi Voidwalker — Cards Shocker would put into an opponent's graveyard are exiled by Dauthi Voidwalker instead, and it can play from among them
7. Endurance — Shocker puts cards into the graveyard that Endurance can bring back
8. Thieves' Guild Enforcer — Shocker fills an opponent's graveyard toward the 8 or more cards Thieves' Guild Enforcer needs
9. Soaring Thought-Thief — Shocker fills an opponent's graveyard toward the 8 or more cards Soaring Thought-Thief needs
10. Merfolk Windrobber — Shocker 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 (Shocker is one).

When a card hits the graveyard thanks to Shocker:

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 (Shocker is one).

When Shocker attacks:

1. Far Fortune, End Boss — deals 1 damage
2. Inti, Seneschal of the Sun — triggers
3. Cool but Rude — draws and discards
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

121 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 (Shocker is one).

When Shocker attacks:

1. Adaptive Omnitool — searches a library
2. Anthem of Rakdos — gives +2/+0
3. Kindred Discovery — draws you 1 card
4. Saw — sacrifices a creature

196 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 (Shocker is one).

1. Tide of War — When Shocker blocks, Tide of War sacrifices a creature

29 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 (Shocker is one).

1. Samwise Gamgee — When Shocker 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 (Shocker is one).

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

346 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 (Shocker is one).

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

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