Base statisticsLevel:
Health icon Health488 – 1967
Mana icon Mana385 – 725
Health regeneration icon Health regen.7 – 16.35
Mana regeneration icon Mana regen.8 – 21.6
Armor icon Armor19.04 – 70.04
Attack damage icon Attack damage55.536 – 101.44
Magic resistance icon Magic resist.30 – 38.5
Critical strike damage icon Crit. damage200%
Movement speed icon Move. speed340
Range icon Attack range550
Attack speed icon Attack speed
Base AS0.625
Attack windup20.078%
AS ratioN/A
Bonus AS0 – 23.12%
Unit radius
Gameplay radius Gameplay radius55
Selection radius Selection radius100
Pathing radius Pathing radius31
Acquisition range Auto radius550

Hextech Affinity [Passive]

Active: Heimerdinger gains 20% bonus Movement Speed while near allied turrets or his own.

H-28G Evolution Turret[Q]

Cost: 20 Mana + 1 Turret Kit Cooldown: 1 second Recharge: 20 seconds Range: 350
Active: Places a Turret. Turret attacks prioritize Heimerdinger's targets and enemies attacking Heimerdinger. Turrets shut down if Heimerdinger moves far away. Heimerdinger generates a Turret Kit and can hold 3 Kits at once. On-Hit Magic Damage: 6 / 9 / 12 / 15 / 18 (+35%)
On-Hit Charge Generation: 1 / 2 / 3 / 4 / 5
Beam Magic Damage: 40 / 60 / 80 / 105 / 130 (+55%)

Hextech Micro-Rockets [W]

Cost: 70 / 80 / 90 / 100 / 110 Mana Cooldown: 11 / 10 / 9 / 8 / 7 seconds Range: 1,325
Active: Unleashes a barrage of 5 rockets that converge towards the cursor and fan out past it. Rockets deals magic damage. Additional rocket hits deal reduced damage. Magic Damage: 50 / 80 / 110 / 140 / 170 (+45%)
Max Non-Minion Damage: 90 / 144 / 198 / 252 / 306 (+93%)

CH-2 Electron Storm GrenadeCH-2 [E]

Cost: 85 Mana Cooldown: 18 / 16 / 14 / 12 / 10 seconds Range: 970 Area of Effect: 250 | 135
Active: Hurls a grenade that deals magic damage to enemies and slows their Movement Speed by 35% for 2 seconds. Enemies in the center of the blast are also stunned for 1.5 seconds.

Hitting a champion fully recharges nearby turret beams. Magic Damage: 60 / 100 / 140 / 180 / 220 (+60%)

UPGRADE!!! [R]

Active: Makes Heimerdinger's next ability free and gives it bonus effects. Reactivate to cancel.

Gameplay tips

Turret placement can be used for more than just damage; Heimer’s passive Movement Speed turns a line of turrets into a means of escape.
Turrets prioritize your last auto-attack target.
Turret laser cooldown is the same as the animation, so lacing abilities between laser beams is key to high damage output.
His ultimate is situational by nature, but Lightning Grenade is the best option by far. If used in a teamfight, you can simultaneously stun and shoot double laser beams through the entire enemy team.
Heimerdinger is better at fighting than he is at running away.

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A brilliant yet eccentric yordle scientist, Professor Cecil B. Heimerdinger is one of the most innovative and esteemed inventors Piltover has ever known. Relentless in his work to the point of neurotic obsession, he thrives on answering the universe's most impenetrable questions.