
Burst Mage · magic (AP) damage
Taliyah is a Burst Mage that deals magic (AP) damage and brings airborne, stun, root, slow. Some of their lockdown (airborne) ignores tenacity, so you dodge it; you can't cleanse or Merc' through it. Below is Taliyah's highest-win-rate build from high-elo games; open the counter-build tool to tune it against your specific enemy team.

Taliyah gains Move Speed near walls.

Taliyah throws a volley of rocks in a target direction, moving freely as she casts. This creates Worked Ground below her. If Taliyah casts Threaded Volley on Worked Ground, she consumes the ground to throw a stronger boulder that slows enemies.

Taliyah causes an area of ground to erupt and throws enemies within it in a direction of her choosing.

Taliyah creates a slowing minefield. If enemies dash through it or are knocked through it, the mines explode and stun them.

Taliyah creates a very long wall and then surfs it.
W Seismic Shove
E Unraveled EarthStuntenacity helpsFROM
E Unraveled EarthRoottenacity helpsFROM
R Weaver's WallSlowignores tenacityFROM
Q Threaded Volley
E Unraveled EarthHover a crowd-control type to see which ability it comes from.
Sorcery
Summon Aery
Arcane Comet
Deathfire Touch
Axiom Arcanist
Manaflow Band
Nimbus Cloak
Transcendence
Celerity
Absolute Focus
Scorch
Waterwalking
Gathering Storm
Precision
Press the Attack
Lethal Tempo
Fleet Footwork
Conqueror
Absorb Life
Triumph
Presence of Mind
Legend: Alacrity
Legend: Haste
Legend: Bloodline
Coup de Grace
Cut Down
Last Stand

Based on 2190 games · 48.2% win rate · challenger+grandmaster+master+emerald-diamond+platinum-emerald · patch 16.18.1.
Domination
Electrocute
Dark Harvest
Hail of Blades
Cheap Shot
Taste of Blood
Sudden Impact
Sixth Sense
Grisly Mementos
Deep Ward
Treasure Hunter
Relentless Hunter
Ultimate Hunter
Inspiration
Glacial Augment
Unsealed Spellbook
First Strike
Hextech Flashtraption
Magical Footwear
Cash Back
Triple Tonic
Time Warp Tonic
Biscuit Delivery
Cosmic Insight
Approach Velocity
Jack Of All Trades

Based on 1345 games · 52.5% win rate · challenger+grandmaster+master+emerald-diamond+platinum-emerald · patch 16.18.1.
Domination
Electrocute
Dark Harvest
Hail of Blades
Cheap Shot
Taste of Blood
Sudden Impact
Sixth Sense
Grisly Mementos
Deep Ward
Treasure Hunter
Relentless Hunter
Ultimate Hunter
Sorcery
Summon Aery
Arcane Comet
Deathfire Touch
Axiom Arcanist
Manaflow Band
Nimbus Cloak
Transcendence
Celerity
Absolute Focus
Scorch
Waterwalking
Gathering Storm

Based on 307 games · 46.9% win rate · challenger+grandmaster+master+emerald-diamond+platinum-emerald · patch 16.18.1.
Sorcery
Summon Aery
Arcane Comet
Deathfire Touch
Axiom Arcanist
Manaflow Band
Nimbus Cloak
Transcendence
Celerity
Absolute Focus
Scorch
Waterwalking
Gathering Storm
Inspiration
Glacial Augment
Unsealed Spellbook
First Strike
Hextech Flashtraption
Magical Footwear
Cash Back
Triple Tonic
Time Warp Tonic
Biscuit Delivery
Cosmic Insight
Approach Velocity
Jack Of All Trades

Based on 185 games · 44.9% win rate · challenger+grandmaster+master+emerald-diamond+platinum-emerald · patch 16.18.1.
Sorcery
Summon Aery
Arcane Comet
Deathfire Touch
Axiom Arcanist
Manaflow Band
Nimbus Cloak
Transcendence
Celerity
Absolute Focus
Scorch
Waterwalking
Gathering Storm
Precision
Press the Attack
Lethal Tempo
Fleet Footwork
Conqueror
Absorb Life
Triumph
Presence of Mind
Legend: Alacrity
Legend: Haste
Legend: Bloodline
Coup de Grace
Cut Down
Last Stand

Based on 161 games · 52.2% win rate · challenger+grandmaster+master+emerald-diamond+platinum-emerald · patch 16.18.1.