Heimerdinger
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Good (7/10)
High Investment Required
Players disagree about Heimerdinger's consistency. Some consider his ability to generate wide boards of upgraded turrets highly engaging and explosive, especially at maximum constellations. While others find his heavy reliance on RNG and the absolute necessity of drawing him early to be frustrating.
Tech Army Overdrive (Optimal C6)
Provides essential Nexus protection and synergizes perfectly with his Tech-focused deck.
Accelerates Heimerdinger's arrival on the board, which is critical since his engine requires his active presence.
Provides consistent, spell-shield-piercing removal that generates elusive turrets.
Strategy
This optimal setup focuses on rapid deployment and overwhelming spell value. Disciple of Shadows ensures Heimerdinger hits the board early, mitigating his slow base cost and jump-starting his turret generation engine.
Defense Spending provides crucial Nexus Toughness to survive early aggression and scales his power. Arcane Comet serves as a reliable removal tool that simultaneously generates high-value 6-cost elusive turrets, allowing Heimerdinger to control the board and push direct Nexus damage.
Turn One Plunder Aggression
Grants Overwhelm to the entire turret army, ensuring their high attack stats translate directly into Nexus damage.
Reduces Heimerdinger's cost by 2 when Plunder is active and provides bonus stats.
Triggers Plunder immediately at the start of the game via Nexus damage.
Strategy
This aggressive build is designed to play Heimerdinger on the very first turn. Swain's Raven Army automatically damages the enemy Nexus at game start, activating the cost reduction from Packed Powder.
Establishing Heimerdinger immediately bypasses his primary weakness—his slow early game—allowing turret generation to begin before the opponent can develop a threatening board. The Beast Within ensures that the generated turrets can push lethal damage through enemy blockers.
Zoe's Turret Plating Counter
Zoe Specialized
- Provides essential Nexus protection against Zoe's aggressive early game.
- Ensures Heimerdinger is deployed fast enough to contest the board.
Doubles all spell casts once six mana is reached, rapidly filling the board with upgraded turrets.
Strategy
Heimerdinger is an exceptional choice for the 10-star Zoe adventure. His generated spells provide burst-speed landmark removal, directly countering Zoe's damage-reducing Turret Plating landmark.
This build focuses on surviving the initial onslaught with Defense Spending and Disciple of Shadows. Once the six-mana threshold is reached, Chemtech Duplicator takes over, allowing single spells to generate double the turrets and completely out-value the opponent.
Early Game Acceleration (Pre-C5)
- Triggers Plunder immediately at the start of the game via Nexus damage.
Reduces Heimerdinger's cost by 2 when Plunder is active.- Further reduces Heimerdinger's cost by 2 when Plunder is active.
Strategy
Before reaching his 5-star upgrade, Heimerdinger struggles significantly with his high base cost. This build guarantees a Turn 1 deployment by stacking Plunder cost reductions.
Swain's Raven Army activates the Plunder condition at the start of the game, allowing the double Scourge's Stash to reduce Heimerdinger's cost by 4. This ensures his engine is online immediately.
Spell Slinging Scaling (Rare Relics)
- Doubles spell casts at six mana, synergizing perfectly with generated removal.
- Provides consistent, spell-shield-piercing removal that generates elusive turrets.
Allows Heimerdinger to consume his own turrets to scale his personal stats.
Strategy
A highly effective build utilizing only Rare relics. Arcane Comet provides reliable removal that, when doubled by Chemtech Duplicator, eliminates multiple threats while generating high-value elusive turrets.
Corrupted Star Fragment solves the issue of board space by allowing Heimerdinger to consume his smaller turrets, scaling his stats to survive late-game encounters and push direct damage.
Other Relic Options
Provides immense value by refilling mana after casting 6+ cost spells, enabling continuous spellcasting and turret generation.
Guarantees a free deployment and provides resilience against early removal, ensuring Heimerdinger eventually sticks to the board.
Ensures Heimerdinger is drawn consistently, preventing the deck from stalling out due to bad draw RNG.
Heimerdinger's relic flexibility is high, provided the choices either accelerate his deployment or maximize the value of his spells. Avoid Starforged Gauntlets, as he cannot reach the Titanic threshold even with stat-boosting relics like Luminous Orb.
Constellation
Heimerdinger's constellation upgrades are heavily reliant on random keyword generation, introducing significant variance into his runs. Upgrades that grant keywords like Lifesteal or Elusive are highly impactful, whereas rolling Formidable is actively detrimental due to the turrets' high-attack, low-health stat distribution. His performance scales dramatically with investment, transforming from a slow, inconsistent champion into an overwhelming force at 6 stars.
Science!
Tech allies in hand and in play have a random upgrade for each time you've spent 6+ mana on spells.
Pursuit of Progress
+1 Starting Mana. When you summon a unit, refill one spell mana.
Science!!! II
Tech allies in hand and in play have a random upgrade from an improved pool of upgrades for each time you've spent 6+ mana on spells.
Biggledust Sprinkle
When you summon a created ally, grant it +1|+1.Review
Considered a low-impact upgrade that provides minimal value compared to other champions. The +1/+1 to created units does not solve his core issues with early game stalling.
Manaflow
Game Start: Get a mana gem.Review
A crucial power spike. Reducing his base cost to 3 enables consistent Turn 1 deployments when combined with cost-reducing relics, completely altering his early game pacing.
Eureka!!!!
Tech allies in hand and in play start the game with 3 random improved upgrades. Game Start: Summon a Mk0: Windup Shredder.Review
Provides an overwhelming immediate board presence with three free upgrades (equivalent to 18 mana worth of value). This enables consistent early wins, though it can bypass his core turret-scaling mechanics by ending encounters too quickly.
Gameplay Tips
- Prioritize Early Deployment
Heimerdinger's entire game plan revolves around his active presence on the board. Mulligan aggressively to ensure he is in the opening hand, as failing to draw him early often results in an insurmountable tempo loss. Equipping Guardian's Trinket or Farsight Alteration can help guarantee his early arrival.
- Countering the Zoe Adventure
Heimerdinger is an exceptional choice for the 10-star Zoe adventure. His generated spells provide burst-speed landmark removal, directly countering Zoe's damage-reducing Turret Plating landmark and turning a difficult encounter into a manageable one.
- Beware of Detrimental Keywords
Due to the random nature of his upgrades, turrets may occasionally receive the Formidable keyword. Because turrets typically possess high attack and low health, this keyword severely reduces their damage output. Additionally, be cautious of transformation effects that turn turrets into Sea Monsters, as this overrides their intended synergies and breaks the deck's core engine.
- Manage Board Space and Turret Cycling
Avoid granting Quick Attack or excessive survivability to standard turrets. The strategy relies on turrets dying in combat to free up board space for newly generated, potentially better-upgraded turrets.