This is how Dark Harvest impacts the keystones Omnistone grants

Project: Omnistone stands as League of Legends’ most misunderstood rune, not due to performance issues but because its intricate mechanics require deep game knowledge to master effectively.

Choosing Omnistone means embracing adaptive gameplay, where the system intelligently selects optimal keystones based on real-time combat situations and champion positioning.

The true complexity emerges when Dark Harvest enters the equation, with collected souls creating multiplicative enhancements across every possible keystone combination.

Community-driven mathematical analysis by Reddit contributor u/Jebsuwu, subsequently verified by Riot Games developers, provides the foundation for understanding these interactions.

Conqueror

Conqueror activates preferentially during extended engagements where both combatants maintain high health pools, with significantly increased frequency for melee champions who benefit most from sustained combat.

Bonus damage = Conqueror stack value + (Conqueror stack value x 2.5% x DH souls) x Number of Conqueror stacks

Fleet Footwork

Fleet Footwork prioritizes activation for champions below level nine operating at critical health thresholds, providing essential sustain during vulnerable early-game phases.

Bonus MS = 20% + (20% x 2.5% x DH souls)

Lethal Tempo

Lethal Tempo maintains consistent activation probability regardless of game state, making it a reliable choice for attack speed-focused champions.

Bonus AS = Lethal Tempo’s base AS + (Lethal Tempo’s base AS x 5% x DH souls)

Press the Attack

Press the Attack delivers its maximum impact on the third consecutive auto attack, with Dark Harvest souls providing substantial flat damage increases that scale linearly with soul collection.

Electrocute

Electrocute mirrors Press the Attack’s stacking mechanism but applies to ability-based damage patterns rather than auto attacks.

Hail of Blades

Hail of Blades triggers most frequently when low-health targets are accessible and your build emphasizes rapid attack sequences.

Bonus AS = 110% x (1 + DH souls x 5%)

Predator

Predator’s movement speed component remains unaffected by Dark Harvest, but its damage output receives significant amplification through soul collection.

Arcane Comet

Arcane Comet launches automatically after damaging enemy champions, with cooldown reduction mechanics rewarding accurate skillshot execution.

Phase Rush

Phase Rush involves complex movement speed calculations that incorporate both base values and slow resistance mechanics.

MS increase = [Base MS x (1 + PR bonus + (PR bonus x DH stacks x 5%)) x (1 – (Slow % – (Slow % x (75% + 75% x 5% x DH souls)]

Summon Aery

Summon Aery demonstrates dual functionality, capable of either harassing enemies or protecting allies based on current combat requirements.

Aftershock

Aftershock provides crucial defensive statistics following crowd control application, creating windows of exceptional durability during teamfight engagements.

Base resist bonus = 35 + (35 x 2.5% x DH souls)
Bonus resist from items = Resist from items x [80% + (80% x 2.5% x DH souls)]

Grasp of the Undying

Grasp of the Undying operates on a four-stack cycle, with the empowered auto attack delivering health-based damage while simultaneously providing sustain and permanent maximum health increases.

Bonus damage (melee) = Total HP x [4% + (4% x 3.33% x DH souls)
Bonus damage (ranged) = Total Hp x [2.4% + (2.4% x 3.33% x DH souls)
Healing (melee) = Total HP x [2% + (2% x 3.33% x DH souls)
Healing (ranged) = Total HP x [1.2% + (1.2% x 3.33% x DH souls)
Total bonus HP = Grasp of the Undying damage x [5 + (5 x 5% x DH souls)

Glacial Augment

Glacial Augment activates more frequently when players utilize active items with slow components, enhancing both targeted and area control capabilities.

Slow effectiveness = Enemy raw MS x [1- (Base value x 2.5% x DH stacks)]

Mastering Omnistone requires understanding which champions synergize best with the random keystone system. Bruisers and hybrid damage dealers typically extract maximum value, as they can utilize both offensive and defensive keystones effectively throughout different game phases.

Optimal champion selections include those with flexible build paths and adaptive combat patterns, similar to strategies discussed in our Class Guide for optimal role performance.

Common mistakes include forcing specific keystone activations through unnatural play patterns, rather than allowing the system to complement your current engagement style naturally.

Advanced optimization involves tracking your Dark Harvest soul count to anticipate power spikes, much like weapon unlock timing in our Weapons Unlock guide, where resource accumulation directly translates to combat effectiveness.

Timing your aggression around expected keystone rotations can create unexpected advantages, particularly during objective contests where every statistical edge matters.

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