Dr. Eggman

a Vehicle enters the battlefield — 207 cards in the game can cause this (Dr. Eggman is one).

1. Carrion Cruiser — When Carrion Cruiser enters thanks to Dr. Eggman, it mills a card
2. Kolodin, Triumph Caster — When a Vehicle enters thanks to Dr. Eggman, Kolodin, Triumph Caster turns something into a creature
3. Miles "Tails" Prower — When a Vehicle enters thanks to Dr. Eggman, Miles "Tails" Prower draws you 1 card

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

When a permanent makes a player discard a card thanks to Dr. Eggman:

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 (Dr. Eggman is one).

When Dr. Eggman 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.

a Human enters the battlefield — 4,639 cards in the game can cause this (Dr. Eggman is one).

When Dr. Eggman enters:

1. General Kudro of Drannith — hits a graveyard
2. Heronblade Elite — puts a +1/+1 counter on itself
3. Kyler, Sigardian Emissary — puts a +1/+1 counter on itself
4. Thalia's Lieutenant — puts a +1/+1 counter on itself
5. Champion of the Parish — puts a +1/+1 counter on itself
6. Captain of the Mists — untaps itself
7. Erkenbrand, Lord of Westfold — gives +1/+0
8. Beregond of the Guard — gives +1/+1
9. Théoden, King of Rohan — grants double strike
10. Lossarnach Captain — taps a creature an opponent controls

2 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 (Dr. Eggman is one).

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

When a card hits the graveyard thanks to Dr. Eggman:

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 (Dr. Eggman is one).

When Dr. Eggman 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

123 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 (Dr. Eggman is one).

1. Adaptive Omnitool — When Dr. Eggman attacks, Adaptive Omnitool searches a library

200 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 (Dr. Eggman is one).

1. Samwise Gamgee — When a Construct, Robot or Vehicle enters thanks to Dr. Eggman, 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 (Dr. Eggman is one).

1. Slash, Reptile Rampager — When a Construct, Robot or Vehicle enters thanks to Dr. Eggman, Slash, Reptile Rampager deals 2 damage
2. Gimli of the Glittering Caves — When Dr. Eggman enters, Gimli of the Glittering Caves puts counters on a permanent

354 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 (Dr. Eggman is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When a Construct, Robot or Vehicle enters thanks to Dr. Eggman, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself

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