Causes: create a Clue artifact token, put a Clue artifact token onto the battlefield, exile a card, anything leaves the battlefield, put anything onto the battlefield, transform anything, an instant leaves a graveyard, a sorcery leaves a graveyard, draw a card.

Cares about: an instant in a graveyard, a sorcery in a graveyard.

Works well with

an instant leaves a graveyard — 87 cards in Tamiyo's colors can cause this (Tamiyo is one).

Murktide Regent — When an instant leaves a graveyard thanks to Tamiyo, Inquisitive Student // Tamiyo, Seasoned Scholar, Murktide Regent puts a +1/+1 counter on itself

a planeswalker it grants abilities to — 86 cards in Tamiyo's colors can cause this.

Ichormoon Gauntlet — Ichormoon Gauntlet gives Tamiyo, Inquisitive Student // Tamiyo, Seasoned Scholar an extra ability
Way of the Cryomancer — Way of the Cryomancer gives Tamiyo, Inquisitive Student // Tamiyo, Seasoned Scholar an extra ability
Way of the Wildspeaker — Way of the Wildspeaker gives Tamiyo, Inquisitive Student // Tamiyo, Seasoned Scholar an extra ability

83 other cards cause it too. These are the ones with the most connections.

a Wizard creature enters the battlefield — 651 cards in Tamiyo's colors can cause this (Tamiyo is one).

Diviner's Wand — When Tamiyo, Inquisitive Student // Tamiyo, Seasoned Scholar enters, Diviner's Wand triggers

anything leaves a graveyard — 706 cards in Tamiyo's colors can cause this (Tamiyo is one).

When an instant or sorcery leaves a graveyard thanks to Tamiyo, Inquisitive Student // Tamiyo, Seasoned Scholar:

Hologram Stalker — makes a token
Willow Geist — puts a +1/+1 counter on itself

a token enters the battlefield — 1,278 cards in Tamiyo's colors can cause this (Tamiyo is one).

When a Clue enters thanks to Tamiyo, Inquisitive Student // Tamiyo, Seasoned Scholar:

Mister Fantastic, Reed Richards — draws you 1 card
Cloakwood Swarmkeeper — puts a +1/+1 counter on itself
Woodland Champion — puts that many +1/+1 counters on itself
Wildwood Mentor — puts a +1/+1 counter on itself
Junk Winder — taps a creature, artifact, enchantment, planeswalker or battle an opponent controls

a token is created — 1,279 cards in Tamiyo's colors can cause this (Tamiyo is one).

Idol of Oblivion — When Tamiyo, Inquisitive Student // Tamiyo, Seasoned Scholar makes a Clue token, Idol of Oblivion draws you 1 card

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

a card is drawn — 1,895 cards in Tamiyo's colors can cause this (Tamiyo is one).

When Tamiyo, Inquisitive Student // Tamiyo, Seasoned Scholar makes a player draw a card:

Toothy, Imaginary Friend — puts a +1/+1 counter on itself
Aether Syphon — mills a card
Ominous Seas — puts a foreshadow counter on itself
Iron Man, Armored Avenger — puts a counter on a creature
The Astonishing Ant-Man — puts a +1/+1 counter on itself
Psychosis Crawler — makes each opponent lose 1 life
Lyla, Holographic Assistant — puts a counter on a creature
Data, New Life — puts a +1/+1 counter on itself
Chasm Skulker — puts a +1/+1 counter on itself
Nadir Kraken — puts a +1/+1 counter on itself

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

a nontoken creature leaves the battlefield — 1,175 cards in Tamiyo's colors can cause this (Tamiyo is one).

Dual Nature — When Tamiyo, Inquisitive Student // Tamiyo, Seasoned Scholar leaves the battlefield, Dual Nature exiles a creature

a creature leaves the battlefield — 1,192 cards in Tamiyo's colors can cause this (Tamiyo is one).

When Tamiyo, Inquisitive Student // Tamiyo, Seasoned Scholar leaves the battlefield:

Dour Port-Mage — draws you 1 card
Three Tree Scribe — puts a counter on a creature
Imperial Cosmographer — puts 2 +1/+1 counters on itself

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

an artifact enters the battlefield — 2,922 cards in Tamiyo's colors can cause this (Tamiyo is one).

When a Clue enters thanks to Tamiyo, Inquisitive Student // Tamiyo, Seasoned Scholar:

Transplant Theorist — draws you 1 card
Elvish Archivist — puts 2 +1/+1 counters on itself
Mechan Assembler — makes a token
Rook Turret — draws you 1 card
Skyswimmer Koi — draws you 1 card
Kappa Cannoneer — puts a +1/+1 counter on itself
Arcbound Crusher — puts a +1/+1 counter on itself
Sarinth Steelseeker — searches a library
Battered Golem — untaps itself
Grinding Station — untaps itself

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

a creature attacks — 6,391 cards in Tamiyo's colors can cause this (Tamiyo is one).

When Tamiyo, Inquisitive Student // Tamiyo, Seasoned Scholar attacks:

Adaptive Omnitool — searches a library
Kindred Discovery — draws you 1 card
Teo, Spirited Glider — draws you 1 card
Shadow Puppeteers — turns something into a creature
Screaming Swarm — mills a card
Imperious Mindbreaker — mills a card
Staff of Titania — makes a token
Saw — sacrifices a creature
Ultima Weapon — kills a creature an opponent controls
Throwing Knife — sacrifices itself

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

anything attacks — 6,391 cards in Tamiyo's colors can cause this (Tamiyo is one).

When Tamiyo, Inquisitive Student // Tamiyo, Seasoned Scholar attacks:

ED-E, Lonesome Eyebot — puts a quest counter on itself
Madame Web, Clairvoyant — mills a card
Bonny Pall, Clearcutter — draws you 1 card
Hazardroot Herbalist — gives +1/+0
Ranger Class — puts a counter on a creature
Campsite Cuisine — sacrifices a Food
Gossip's Talent — triggers
Toph, Earthbending Master — puts a counter on a permanent
Alora, Merry Thief — triggers
Twins of Discord — triggers

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

a creature blocks — 6,391 cards in Tamiyo's colors can cause this (Tamiyo is one).

When Tamiyo, Inquisitive Student // Tamiyo, Seasoned Scholar blocks:

Barrow-Blade — strips abilities
Dead-Iron Sledge — kills a creature
Dwindle — kills a creature

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

a creature deals combat damage — 6,391 cards in Tamiyo's colors can cause this (Tamiyo is one).

Primo, the Unbounded — When Tamiyo, Inquisitive Student // Tamiyo, Seasoned Scholar deals combat damage, Primo, the Unbounded makes a token

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

a creature is cast — 6,423 cards in Tamiyo's colors can cause this (Tamiyo is one).

Champions of the Perfect — When Tamiyo, Inquisitive Student // Tamiyo, Seasoned Scholar is cast, Champions of the Perfect draws you 1 card

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

a creature enters the battlefield — 7,050 cards in Tamiyo's colors can cause this (Tamiyo is one).

Legolas Greenleaf — When Tamiyo, Inquisitive Student // Tamiyo, Seasoned Scholar enters, Legolas Greenleaf puts a counter on a permanent

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