Heimerdinger

The Revered Inventor · Specialist

View builds

Summoner's Rift ARAM Arena Nexus Blitz URF One for All Swiftplay Ultimate Spellbook

No Ultimate Spellbook-specific changes; plays as on Summoner's Rift.

Abilities

PassiveHextech Affinity

Gain Move Speed while near allied towers and turrets deployed by Heimerdinger.

QH-28 G Evolution Turret1s20

Heimerdinger lays down a rapid-fire cannon turret equipped with a secondary pass-through beam attack (turrets deal half damage to towers).

WHextech Micro-Rockets11/10/9/8/7s50/60/70/80/90

Heimerdinger fires long-range rockets that converge on his cursor.

ECH-2 Electron Storm Grenade11s85

Heimerdinger lobs a grenade at a location, dealing damage to enemy units, as well as stunning anyone directly hit and slowing surrounding units.

RUPGRADE!!!100/85/70s100

Heimerdinger invents an upgrade, causing his next spell to have increased effects.

Patch history

26.11 · May 28, 2026

H-28G Evolution Turret
Turret attack range increased to 550 from 530.
New Effect: Turrets now gain 50 bonus range against minions if nothing else is in range.
Turret vision range increased to 650 from 585.
CH-2 Electron Storm Grenade
Vision duration increased to 1.25 seconds from 1.

26.3 · Feb 4, 2026

Stats
Health growth increased to 105 from 101.
Hextech Micro-Rockets
Initial rocket base damage increased to 50 to 150 from 40 to 140.

25.19 · Sep 24, 2025

H-28Q Apex Turret
New Effect: H-28Q Apex Turret now follows Heimerdinger into Realm of Death.
Hextech Micro-Rockets
Bug Fix: Tooltip now correctly calculates the rockets' total base damage.

25.15 · Jul 30, 2025

CH-2 Electron Storm Grenade
Bug Fix: Grenade radius for H-28G Evolution Turret / H-28Q Apex Turret aggro purposes increased to equal its damage radius (250) from previously 210, in accordance with patch 7.10 changes.

25.14 · Jul 16, 2025

Hazmat Heimerdinger
Hextech Micro-Rockets
Bug Fix: Restored on-hit SFX.

35 older patches

14.24

H-28G Evolution Turret
Bug Fix: Floating charge count VFX no longer resets every 0.25 seconds when 2 trinket wards are available.
Bug Fix: Turret death SFX no longer plays repeatedly if the turret is destroyed near its deactivation time.
Hextech Micro-Rockets
Bug Fix: No longer reveals the user if cast while the cursor is near an enemy champion.
Hextech Rocket Swarm
Bug Fix: No longer reveals the user if cast while the cursor is near an enemy champion.

14.11

H-28G Evolution Turret
Bug Fix: Ability is no longer sometimes locked out even when charges were available, because of the recharge cooldown being desynced from the ability's charge count as they are used.

Base stats

Health558 +105/lvl
Mana385 +20/lvl
Attack Damage56 +2.7/lvl
Attack Speed0.658 +1.36/lvl
Armor19 +4.2/lvl
Magic Resist30 +1.3/lvl
Base Health Regen7 +0.55/lvl
Base Mana Regen8 +0.8/lvl
Move Speed340
Range550

Ranged · Resource: Mana

Undocumented: Heimerdinger no longer has a buff that tracks his charges and the recharge timer. This buff was also previously desynced from his actual charge count.

Bug Fix: The floating charge count on his VFX around his model is now synced with the actual amount of available charges on the ability.

14.2

H-28G Evolution Turret
New Effect: Now updates its stats every 1 second in order to reflect level ups, rank ups, and the caster's changes in ability power.
Bug Fix: Warden's Mail and Randuin's Omen no longer improperly slow their attack speed.
H-28Q Apex Turret
New Effect: Now updates its stats every 1 second in order to reflect level ups, rank ups, and the caster's changes in ability power.

13.22

Stats
Base attack speed increased to 0.658 from 0.625.
Attack windup reduced to 20% from 20.078125%.

13.15

UPGRADE!!!
H-28Q Apex Turret
Base health changed to 725;750;775;800;825;875;925;975;1025;1075;1225;1375;1525 from 1100 to 1700.
Health AP ratio changed to 50% AP at all levels from 25;25+17.5*x AP.
Armor increased to 30 to 90 from 10;10+5*x for 6;then +10*x.
Magic resistance increased to 30 to 90 from 25;25+5*x.

13.7

H-28G Evolution Turret
Undocumented: Now begins the game with one charge available instead of three.
Known Bug: Spawning or respawning will cause the buff to not correctly track his charges, showing three charges available instead of one. This is further de-synced as turrets are placed and destroyed (and only syncs up when he has no turrets deployed and three charges actually available).
Reminder that the count on his VFX around his model is synced up with the count on the buff bar, not on his Q.
UPGRADE!!!
Undocumented/Bug Fix: No longer automatically refreshes the cooldowns of Hextech Micro-Rockets or CH-2 Electron Storm Grenade when cast (including when the ability is canceled).

12.21

H-28Q Apex Turret
Bug Fix: Casting the ability no longer improperly resets the cooldowns of Hextech Micro-Rockets and CH-2 Electron Storm Grenade if they were already on cooldown.

12.12

H-28G Evolution Turret
Turret base damage increased to 7 to 23 from 6 to 18.
Turret base health increased to 175 to 700 from 150 to 575.
CH-2 Electron Storm Grenade
Cooldown reduced to 11 seconds from 12.

12.10

Stats
Base health increased to 558 from 488.
Health growth increased to 101 from 87.
Armor growth increased to 4.2 from 3.
Magic resistance growth increased to 1.3 from 0.5.

12.1

H-28G Evolution Turret
Bug Fix: Deactivation sound effects have been restored for several of his skins.
CH-2 Electron Storm Grenade
Bug Fix: Explosion sound effects no longer play multiple times upon hitting an enemy.

11.9

Hextech Micro-Rockets
Initial rocket base damage reduced to 50 to 150 from 50 to 170.
Subsequent rocket base damage reduced to 10 to 30 from 10 to 34.
Maximum base damage: 90 to 270 from 90 to 306.

11.1

Stats
Base attack damage increased to 56 from 55.536.
Base armor reduced to 19 from 19.04.

10.15

H-28G Evolution Turret
Bug Fix: Turret now properly triggers Manaflow Band.

10.14

H-28G Evolution Turret
Bug Fix: Approaching and triggering his turrets no longer triggers Immolate.

9.21

UPGRADE!!!
Bug Fix: Tooltip no longer mentions that his CH-3X Lightning Grenade slow is improved to 80%.

9.19

H-28G Evolution Turret
Turret basic attack AP ratio increased to 35% AP from 30% AP.
H-28Q Apex Turret
Turret basic attack AP ratio increased to 35% AP from 30% AP.
CH-2 Electron Storm Grenade
Stun duration increased to 1.5 seconds from 1.25.

9.6

H-28G Evolution Turret
New Effect: Now triggers effects that are triggered by pets (i.e. on-ability-hit effects). Turret lasers, ult turrets shots, and ult turret lasers are classified as AoE effects, too.

9.1

H-28G Evolution Turret
New Effect: Can now ping the number of turrets available or time until next turret if none are available.

8.24

H-28G Evolution Turret
Bug Fix: Dying while third turret charge is stockpiling no longer allows him to get a fourth charge.
Hextech Rocket Swarm
Bug Fix: Once again shares a cooldown with Hextech Micro-Rockets.
CH-2 Electron Storm Grenade
Bug Fix: Stun duration has been fixed.
CH-3X Lightning Grenade
Bug Fix: Stun duration has been fixed.
Bug Fix: Can no longer cast it immediately after CH-2 Electron Storm Grenade if timed exactly.
H-28G Evolution Turret
Bug Fix: Beam attack cooldown now once again scales with cooldown reduction.
Turret stats have been moved into the expanded tooltip (hold SHIFT). Expanded tooltip now indicates that turret health scales off of Heimerdinger's ability power.
Hextech Micro-Rockets
Bug Fix: Tooltip now notes the actual calculation for minion damage instead of noting an incorrect and irrelevant "60% damage" modifier.
Hextech Rocket Swarm
Missile 1 damage unchanged.
Missiles 2 to 5 base damage increased to 32 from 28.
Missiles 6 to 20 base damage reduced to 50% of lesser base damage from 60% (now matches AP ratio modifier).
Missiles 6 to 20 base damage reduced to 16 from 16.8.
Maximum base damage: 503 from 499.

8.22

Dragon Trainer Heimerdinger
Bug Fix: No longer has redundant death SFX.
Bug Fix: Is no longer missing dance SFX.

8.9

Stats
Base mana increased to 385 from 307.2.
Mana growth reduced to 20 from 40.
Base mana regeneration increased to 8 from 6.

8.1

H-28Q Apex Turret
Beam base damage reduced to 100 from 200.

7.22

Stats
Base health increased to 488 from 476.
Health growth increased to 87 from 75.

7.16

H-28Q Apex Turret
Bug Fix: Beam attack no longer breaks for the rest of its duration if its target walks out of range during the beam attack's wind-up.

7.15

Hextech Rocket Swarm
Bug Fix: Now correctly applies the subsequent rocket damage against Baron Nashor instead of dealing full damage.
CH-2 Electron Storm Grenade
Bug Fix: Sweeping a ward no longer plays the sound effects to it when he is in the game.
CH-3X Lightning Grenade
Bug Fix: No longer uses the old AP ratio of 60% for the second and third bounces.

7.12

General
Bug Fix: Must now actually fire a basic attack to command turrets to focus a target. Issuing an attack command and immediately cancelling it no longer triggers the redirect.
CH-2 Electron Storm Grenade
Bug Fix: Now properly charges nearby turret beam attacks even if it kills an enemy.

7.11

H-28G Evolution Turret
Removed: Turrets killed increasing the minion killed stat. H-28Q Apex Turret still increases the creep score.

7.10

Stats
Base health regeneration reduced to 7 from 11.008.
Health regeneration growth reduced to 0.55 from 1.75.
Hextech Affinity
Renamed to Hextech Affinity from Techmaturgical Repair Bots.
New Effect: Grants 20% bonus movement speed while near allied turrets (his H-28G Evolution Turret and the map's) (300 range).
Removed: Heimerdinger grants nearby allied champions and his H-28G Evolution Turret 10;15;20;25;30 health regeneration, persisting for 5 seconds after they move out of range or his death (1000 range).
H-28G Evolution Turret
Maximum charges increased to 3 at all ranks from 1.
Recharge timer reduced to 20 seconds at all ranks from 24.
Cannon base damage reduced to 6 from 12.
Cannon AP ratio increased to 30% AP from 15% AP.
Beam base damage reduced to 40 from 40.
Removed: Turrets no longer prioritize nearby enemy champions or champions that attack them.
Removed: Turrets no longer briefly remain active after Heimerdinger leaves the area.
Beam attack generation rate per second reduced to 1.1% from 6.25%.
Beam attack charge time increased to 90 seconds from 16.
Removed: Turrets no longer gain 1% beam charge for each of their basic attacks.
Removed: Turrets no longer spawn with 70% beam charge.
New Effect: The charge bar is now white instead of dark blue.
Hextech Micro-Rockets
Mana cost reduced to 50 from 70.
Cooldown reduced to 11 seconds from 11 at all ranks.
New Effect: Each rocket that hits a champion grants 20% beam charge to all turrets within 1000 range of the damage, up to a maximum of 100% if all five rockets hit.
CH-2 Electron Storm Grenade
Cooldown changed to 12 seconds at all ranks from 18.
Grenade radius increased to 250 from 210. Stun radius unchanged.
New Effect: If the grenade hits a champion, all turrets within 1000 range of the damage gain 100% beam charge.
New Effect: Heimerdinger can now lob the grenade onto himself.
CH-3X Lightning Grenade
Base damage increased to 150 from 150.
AP ratio increased to 75% AP from 60% AP.

7.9

Stats
Magic resistance growth increased to 0.5 from 0.

7.4

General
Adjusted splash artwork for Alien Invader Heimerdinger.

7.2

Stats
Undocumented: Health regeneration increased to 11.008 from 11.005.

6.24

Hextech Micro-Rockets
Bug Fix: Rockets beyond the first now deal reduced damage to the Poro King (he's now treated as a monster, rather than a minion).

6.1

CH-2 Electron Storm Grenade
Bug Fix: Fixed a bug where Heimerdinger's grenade was granting too much vision for the duration.

4.20

Stats
Base health regeneration increased to 11.005 from 0.
Health regeneration growth increased to 1.75 from 0.6.
Techmaturgical Repair Bots
Removed: No longer affects Heimerdinger.

4.17

UPGRADE!!!
New Effect: Can be primed while disabled.