Matchup

Heimerdinger
Heimerdinger
20%
80%

vs

45.3%

over 375 games

Ornn
Ornn
63%
37%
Heavy CCVery tankyStrong engage

Skill matchup

Build vs Ornn

Build adapted to this matchup

Starting items

Doran's Ring
Health Potion
x2

Core build

Rabadon's Deathcap
1Mage
Void Staff
2vs Tank
Zhonya's Hourglass
3vs AD

Standard

Sorcerer's Shoes
4Magic pen
Liandry's Torment
5Mage tank

Summoner spells

41243%
41436%

Anti AP

Mercury's Treads
4vs CC
Banshee's Veil
5vs AP

Anti Heal

Morellonomicon
6vs Heal

Anti Tank

Shadowflame
5vs Tank
Bloodletter's Curse
vs Tank
Stormsurge
vs Tank
Cryptbloom
vs Tank

DPS

Liandry's Torment
Mage tank
Blackfire Torch
Mage
Rylai's Crystal Scepter
Mage tank
Luden's Echo
Mage
Seraph's Embrace
Mage

Other options

Tear of the Goddess
Mejai's Soulstealer
100.0% WR5 games
PrecisionPrecision
ConquerorConqueror
Presence of MindPresence of Mind
Legend: HasteLegend: Haste
Cut DownCut Down
SorcerySorcery
Absolute FocusAbsolute Focus
Gathering StormGathering Storm
Adaptive ForceAdaptive ForceHealth Scaling

Power Spikes

Strength by game phase

Early (0-15)
Mid (15-30)
Late (30+)
HeimerdingerHeimerdinger
OrnnOrnn
Neutral
Neutral
Neutral

Ornn's abilities

Passive, spells and ultimate

Living Forge (P)

Ornn gains an additional bonus Armor and Magic Resist from all sources.Ornn can spend gold to forge non-consumable items anywhere.Additionally, he can create masterwork items for himself and for his allies.

Cooldowns

Cooldowns by spell rank

LevelQWER
39s12s14s
68s12s14s2m20
97s11.5s14s2m20
117s11s14s2m
167s10s13s1m40
187s10s12s1m40

Playing against Ornn

How to counter and exploit weaknesses

1

Sidestep his R (ram): he has to redirect it and that's the main knockup. If you dodge the return, he loses his engage.

2

Destroy his Q pillar before he E's into it — the pillar is breakable and gives him the knockup.

3

Ornn is weak in the early game against aggressive champions — punish him before he becomes an unkillable tank.

4

After level 14, respect his upgraded items and those of his allies — the stat advantage is real.

Source: op.gg + LTL Engine · Patch 16.9.1 · May 9, 2026