Heimerdinger
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Good (7/10)
High Investment Required
Rare Relics OK
Paid Relics
Heimerdinger offers a highly variable, RNG-dependent playstyle that excels at generating wide boards of upgraded turrets. Players disagree about his overall enjoyment; some find the unpredictable turret upgrades highly engaging, while others find the lack of consistency and reliance on drawing the champion frustrating.
Tech Army Overdrive
Provides essential Nexus protection and synergizes with his Tech-focused deck.
Accelerates Heimerdinger's arrival on the board, which is critical since his engine requires his active presence.
Doubles all spell casts once six mana is reached, rapidly filling the board with upgraded 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. Defense Spending provides crucial Nexus Toughness to survive early aggression. 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.
Turn One Plunder
Triggers Plunder immediately at the start of the game via Nexus damage.
Reduces Heimerdinger's cost by 2 when Plunder is active and provides bonus stats.
Further reduces Heimerdinger's cost by 2 when Plunder is active.
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 reductions from both Packed Powder and The Scourge's Stash. Establishing Heimerdinger immediately bypasses his primary weakness—his slow early game—allowing turret generation to begin before the opponent can develop a threatening board.
Spell Slinging Scaling
- 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
Guarantees a free deployment and provides resilience against early removal, ensuring Heimerdinger eventually sticks to the board.
Grants Overwhelm to the entire turret army, ensuring their high attack stats translate directly into Nexus damage.
Sustains spell mana generation to continuously fuel turret production every round.
Heimerdinger's relic flexibility is high, provided the choices either accelerate his deployment or maximize the value of his spells.
Constellation
Heimerdinger's constellation upgrades are heavily reliant on random keyword generation, which introduces 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. He requires substantial investment to overcome his slow base kit.
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
This upgrade is universally assessed as a low-impact roadblock. The minor stat boost fails to provide the necessary stalling power required for high-difficulty encounters, making it an inefficient use of resources.
Manaflow
Game Start: Get a mana gem.Review
A critical upgrade for Heimerdinger's consistency. The base cost reduction is essential for enabling early deployment strategies, particularly when combined with cost-reducing relics, allowing him to bypass his early-game vulnerability.
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 a massive, immediate power spike. The free starting upgrades generate immense early value, often securing victories within the first few turns. However, this overwhelming speed can sometimes bypass his core turret-generation mechanics entirely.
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.
- 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.
- Leverage Spell Mana
Drafting spells, particularly targeting spells or those costing six or more mana, is highly beneficial. Heimerdinger's ability to convert spell mana into board presence makes him uniquely equipped to utilize expensive spells efficiently.
- 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. Plan combat math accordingly when this occurs.