Star Pupil

a Human gets a counter — 326 cards in the game can cause this (Star Pupil is one).

1. Cloaked Cadet — When Star Pupil gets a counter, Cloaked Cadet draws you 1 card

a nontoken Wizard enters the battlefield — 1,243 cards in the game can cause this (Star Pupil is one).

1. Inalla, Archmage Ritualist — When Star Pupil enters, Inalla, Archmage Ritualist makes a token

a Wizard creature enters the battlefield — 1,264 cards in the game can cause this (Star Pupil is one).

1. Diviner's Wand — When Star Pupil enters, Diviner's Wand triggers

a creature gets a counter — 2,691 cards in the game can cause this (Star Pupil is one).

1. Scurry Oak — When Scurry Oak gets a counter thanks to Star Pupil, it makes a token
2. Fathom Mage — When Fathom Mage gets a counter thanks to Star Pupil, it draws you 1 card
3. Hollowmurk Siege — When Star Pupil gets a counter, Hollowmurk Siege draws you 1 card
4. Wickersmith's Tools — When a creature gets a counter thanks to Star Pupil, Wickersmith's Tools puts a charge counter on itself
5. Hapatra, Vizier of Poisons — When a creature gets a counter thanks to Star Pupil, Hapatra, Vizier of Poisons makes a token
6. Ant-Man, Colony Commander — When Star Pupil gets a counter, Ant-Man, Colony Commander makes a token
7. Flourishing Defenses — When a creature gets a counter thanks to Star Pupil, Flourishing Defenses makes a token
8. Nest of Scarabs — When a creature gets a counter thanks to Star Pupil, Nest of Scarabs makes that many tokens
9. Earth Kingdom General — When Star Pupil gets a counter, Earth Kingdom General gains you that much life
10. Obelisk Spider — When a creature gets a counter thanks to Star Pupil, Obelisk Spider makes each opponent lose 1 life

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

anything gets a counter — 4,415 cards in the game can cause this (Star Pupil is one).

1. All Will Be One — When Star Pupil gets a counter, All Will Be One deals that much damage
2. Lonis, Genetics Expert — When Lonis, Genetics Expert gets a counter thanks to Star Pupil, it triggers

7 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 (Star Pupil is one).

When Star Pupil 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.

anything attacks — 17,934 cards in the game can cause this (Star Pupil is one).

When Star Pupil 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

114 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 (Star Pupil is one).

When Star Pupil 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

182 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 (Star Pupil is one).

When Star Pupil 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

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

a creature deals combat damage — 17,934 cards in the game can cause this (Star Pupil is one).

1. Primo, the Unbounded — When Star Pupil deals combat damage, Primo, the Unbounded makes a token

197 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 (Star Pupil is one).

When Star Pupil 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 (Star Pupil is one).

When Star Pupil enters:

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

315 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 (Star Pupil is one).

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

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