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

Poppy throws her buckler that bounces off the target. Poppy can pick it up to gain a temporary shield.

Poppy swings her hammer, dealing damage and creating a zone that will slow enemies and explode after a delay.

Poppy passively gains Armor and Magic Resist. This bonus increases when she is low on Health. Poppy can activate Steadfast Presence to gain Move Speed and stop enemy dashes around her. If a dash is stopped, the enemy is slowed and grounded.

Poppy dashes to the target and pushes it back. If the target is pushed into a wall, it is stunned.

Poppy channels a hammer strike that knocks enemies very far away.
R Keeper's VerdictStuntenacity helpsFROM
E Heroic ChargeSlowignores tenacityFROM
Q Hammer Shock
W Steadfast Presence
R Keeper's VerdictHover a crowd-control type to see which ability it comes from.
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 3053 games · 51.6% win rate · challenger+grandmaster+master+emerald-diamond+platinum-emerald · patch 16.18.1.
Resolve
Grasp of the Undying
Aftershock
Guardian
Demolish
Font of Life
Shield Bash
Conditioning
Second Wind
Bone Plating
Overgrowth
Revitalize
Unflinching
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 1506 games · 48.5% 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 652 games · 50.8% win rate · challenger+grandmaster+master+emerald-diamond+platinum-emerald · patch 16.18.1.
Resolve
Grasp of the Undying
Aftershock
Guardian
Demolish
Font of Life
Shield Bash
Conditioning
Second Wind
Bone Plating
Overgrowth
Revitalize
Unflinching
Sorcery
Summon Aery
Arcane Comet
Deathfire Touch
Axiom Arcanist
Manaflow Band
Nimbus Cloak
Transcendence
Celerity
Absolute Focus
Scorch
Waterwalking
Gathering Storm

Based on 43 games · 53.5% win rate · challenger+grandmaster+master+emerald-diamond+platinum-emerald · patch 16.18.1.