
Vanguard · physical (AD) damage
Later items show higher win rates partly because games that last that long are usually already being won. Compare items within a slot, not across slots.
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
Resolve
Grasp of the Undying
Aftershock
Guardian
Demolish
Font of Life
Shield Bash
Conditioning
Second Wind
Bone Plating
Overgrowth
Revitalize
Unflinching

Based on 6,081 games · 47.1% win rate · High elo · patch 26.20.
Later items show higher win rates partly because games that last that long are usually already being won. Compare items within a slot, not across slots.
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
Resolve
Grasp of the Undying
Aftershock
Guardian
Demolish
Font of Life
Shield Bash
Conditioning
Second Wind
Bone Plating
Overgrowth
Revitalize
Unflinching

Based on 43 games · 53.5% win rate · High elo · patch 26.20.

While in combat Gnar generates Rage. At maximum Rage his next ability will transform him into Mega Gnar, granting increased survivability and access to new spells.

Gnar throws a boomerang that damages and slows enemies it hits before returning to him. If he catches the boomerang its cooldown is reduced. Mega Gnar instead throws a boulder that stops on the first unit hit, damaging and slowing everything nearby. It can then be picked up to reduce the cooldown.

Gnar's attacks and spells hype him up, dealing bonus damage and granting him Move Speed. Mega Gnar is too enraged to be hyper and instead can rear up on his hind legs and smash down on the area in front of him, stunning enemies in an area.

Gnar leaps to a location and bounces off the head of any unit he lands on, traveling further. Mega Gnar is too large to bounce and instead lands with earth-shattering force, dealing damage in an area around him.

Mega Gnar throws everything around him in a chosen direction, dealing damage and slowing them. Any enemy that hits a wall is stunned and takes bonus damage.
R GNAR!Stuntenacity helpsFROM
W Hyper / Wallop
R GNAR!Slowignores tenacityFROM
Q Boomerang Throw / Boulder Toss
E Hop / Crunch
R GNAR!Some of their lockdown (airborne) ignores tenacity, so you dodge it; you can't cleanse or Merc' through it.
Tap or hover a crowd-control type to see which ability it comes from.