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Mystic Reverb

Cost	6,400
Tier	4

+8% Spirit Lifesteal
Passive		6.25s
Imbue an ability with Lifesteal and to apply slow on a hit target and deal an additional percentage of the damage dealt to enemies around the target after a short delay.
50% Damage Conditional +22% Imbued Lifesteal -40% Move Speed Conditional 16m Radius 3s Delay Duration





Internal name: upgrade_mystic_reverb
Sounds

Mystic Reverb

Cost	6,400
Tier	4
Enhanced

+33% Spirit Lifesteal
Passive		6.25s
Imbue an ability with Lifesteal and to apply slow on a hit target and deal an additional percentage of the damage dealt to enemies around the target after a short delay.
70% Damage Conditional +22% Imbued Lifesteal -40% Move Speed Conditional 16m Radius 3s Delay Duration





Internal name: upgrade_mystic_reverb
Sounds

“

He-he-You are going to leave a lasting impression my friend!

— Shopkeeper

Mystic Reverb is a Tier 4 Spirit Item that can be purchased from the Shop for 6,400.

Notes

The debuff effect is applied to the first enemy hit. If the imbued ability is an area-of-effect and it hits multiple heroes, only one enemy will receive the debuff.

Pure Damage does not trigger the reverb or use the imbued lifesteal. If an ability has bonus Pure Damage like the blessed stakes of Venator's Ira Domini, it will not be used to calculate the damage of the reverb.
- Mystic Reverb can be imbued on Lady Geist's Soul Exchange, but it has no effect.
Abilities that only deal Melee Damage such as Viscous' Puddle Punch or Calico's Leaping Slash can be imbued, though they cannot activate the reverb or use the imbued lifesteal.
- Spirit Snatch applies after the melee damage and does not allow melee abilities to use Mystic Reverb.
- However, Quicksilver Reload and Mercurial Magnum grant bonus spirit damage to the imbued ability's first hit of weapon or spirit damage and can activate the debuff.
The 50% additional damage only applies to the first instance of damage for abilities that deal more than one instance, such as Abrams' Siphon Life or Calico's Gloom Bombs
The debuff can store damage from items like Quicksilver Reload or Tankbuster on the imbued ability.
The 50% extra damage is calculated based on pre-mitigation damage, but can then still be mitigated by spirit resistance when it triggers.

The initial reverb damage can kill the primary target, but is sometimes non-lethal to secondary targets, leaving them with at least 1 hp remaining. This seems to mainly happen against Target Dummies in Sandbox

View the full update history: Mystic Reverb/Update history

Update	Changes
April 30, 2026	Lifesteal reduced from 10% to 8%. Imbued Lifesteal reduced from 27% to 22%.
February 4, 2026	Imbued Lifesteal from 30% to 27%
January 30, 2026	Spirit Lifesteal reduced from 15% to 10%. Imbued ability now provides +30% Spirit Lifesteal for any damage it does (including the reverb).