
Jayce
View on WikiGood (7.5/10)
High Investment Required
Epic Relics
Paid Relics
Jayce is a late-blooming spellcaster who requires significant constellation investment to overcome a slow early game. Once fully upgraded, his ability to duplicate high-cost spells provides immense satisfaction and board control.
Hextech Artillery
Provides a massive mana refill upon leveling up, enabling immediate follow-up plays.
The cornerstone of Jayce's strategy, doubling his 6+ cost spells once the six-mana threshold is reached.
Ensures early spell mana availability, allowing Jayce to cast his expensive spells sooner.
Strategy
This optimal setup maximizes mana generation and spell duplication. Jayce's Hextech Battery provides a crucial mana refill upon leveling up, while Hidden Tome ensures early spell mana is banked. Once the player reaches six mana gems, Chemtech Duplicator activates, allowing Jayce to dominate the board with duplicated 6-cost spells.
Early Deployment
Reduces Jayce's cost by damaging allies, allowing him to hit the board significantly earlier.
Essential for doubling spells in the later stages of the encounter.
Provides the necessary spell mana to cast high-impact spells once Jayce is deployed.
Strategy
Designed to bypass Jayce's slow early game, Disciple of Shadows allows for a Turn 1 or Turn 2 summon by sacrificing early units. This establishes early board presence and accelerates his level-up condition while waiting for the six-mana threshold to activate Chemtech Duplicator.
Cryogenic Duplication
Delays Jayce's arrival, allowing him to be summoned for free on a later turn.
Doubles all spells once the mana threshold is met.
Provides sustained spell mana generation every round.
Strategy
This combo-oriented build delays Jayce's arrival until Frozen Tomb releases him. By the time he thaws, the player is closer to the six-mana threshold for Chemtech Duplicator. This allows Jayce to enter the board without spending mana on that turn, leaving all resources available for casting massive, duplicated spells.
Standard Spellcaster
The primary win condition, doubling spells at six mana gems.
Ensures a steady supply of spell mana to cast expensive spells.
Provides a consistent stream of champion spells to utilize the mana and duplication effects.
Strategy
A highly effective build using only Rare relics. The Grand General's Counterplan provides a steady stream of champion spells, while Archangel's Staff ensures the spell mana required to cast them. Survival until turn six is critical to activate Chemtech Duplicator and overwhelm the opponent.
Other Relic Options
Synergizes with his 4-star Plunder mechanic for early stat scaling.
Another Plunder enabler that reduces his cost for faster deployment.
The extra damage is multiplied by both Chemtech Duplicator and Jayce's level 2 ability, making it excellent for early threat removal.
Constellation
Jayce's constellation path demands heavy investment. At lower star levels, his high mana curve makes early turns awkward and vulnerable. However, unlocking his higher-tier stars transforms him into a formidable engine capable of overwhelming opponents with duplicated spells and generated keywords.

Hyper Charge
When you play a 6+ cost spell, reduce the cost of non-spells in your hand by 1.
Unstable State
+1 Starting Mana. Round Start: Create a Hextech Anomaly in hand if you don't already have one you created this way.
Hyper Charge II
When you play a 6+ cost spell, reduce the cost of non-spells in your hand by 1, then give allies +1|+0 and a random keyword this round.Review
Duplicating item-granting spells is a powerful mechanic that enables massive stat growth when combined with relics like Chemtech Duplicator.
Gearing Up
Game Start: Summon 2 Armed Gearhead.Review
The Plunder cost reduction is vital for accelerating his game plan, allowing him to hit the board earlier and begin stabilizing.
Manaflow
Game Start: Get a mana gem.Review
Considered his most critical upgrade. The additional mana gem significantly smooths out his painful early mana curve, enabling Turn 2 plays with 6-cost spells.
Hextech Infusion
After you play a 6+ cost spell, deal 10 to a random enemy or the enemy Nexus if there is none.Review
Players disagree about the impact of this power. Some consider the 10 random damage to be a game-breaking board clear that synergizes incredibly well with Chemtech Duplicator. While others find the random targeting frustrating and feel it acts more as a supplementary finisher rather than fixing his early-game vulnerabilities.
Gameplay Tips
- Avoid Cost Reduction Powers
Powers that reduce the cost of spells can actively sabotage Jayce. If a 6-cost spell is reduced to 5 mana, it will no longer trigger his core duplication mechanics. Avoid powers like Glorious Evolution unless you have a specific workaround.
- Prioritize Lifesteal
Jayce's early game is slow, meaning the Nexus will often take damage. Focus on generating Lifesteal through his Hexgate to recover health in the mid-to-late game.
- Drafting is Critical
Jayce's entire strategy revolves around 6+ cost spells. Prioritize reward nodes and shops that offer high-impact, expensive spells to ensure his duplication engine has enough fuel.
- Quest Progression Quirk
When Jayce or Chemtech Duplicator copies a spell, the duplicated cast does not count toward "spend mana" daily or event quests.
- Evolved Synergy
Because Jayce generates a wide variety of keywords through his spells, the Evolved power provides a massive, consistent stat boost to his board.