Leech Therapy
Leech Therapy is Nurse Harrow's first ability in Deadlock (slot 1), an active ability with a 30 second cooldown. Throw a jar of leeches that attach to enemies, dealing spirit damage over time and eating away at the duration of enemy buffs. Leech Therapy was added to Deadlock in the October 20, 2026 patch (build 6803).
Open the most-bought Nurse Harrow build
The 4 items bought most in each phase of 149,398 Nurse Harrow matches, October 30 to November 1, 2026, measured by deadlock-api.com.
Leech Therapy in matches
Nurse Harrow players unlocked Leech Therapy first in 98.0% of matches (147,171 of 150,131) and second in 1.7% of matches (2,608 of 150,131), in all-rank matches from October 30 to November 1, 2026, from patch 6833's release day.
Measured from matches at all ranks from October 30 to November 1, 2026, starting on the day patch 6833 was released (October 30, 2026), by deadlock-api.com. These are match results, not numbers from the game files, and not a recommendation. Each share is the Nurse Harrow matches in which Leech Therapy was the first, second, third or fourth ability unlocked, out of every Nurse Harrow match counted; a step under 500 matches is not listed.
Match data: deadlock-api.com. deadlock-api.com is not endorsed by Valve and does not reflect the views or opinions of Valve or anyone officially involved in producing or managing Valve properties. How a share is computed: methodology.
Leech Therapy stats
Leech Therapy
- Cooldown 30s
- Duration 5s
Throw a jar of leeches that attach to enemies, dealing spirit damage over time and eating away at the duration of enemy buffs.
Harrow can pick up leeches after they finish feeding, healing her for the health drained and permanently granting regeneration and fire rate.
25% of your leech stacks are lost on death.
- 10 Max Leech Stacks
- 8m Leech Crawl Range+1.3 x Boons
Upgrades
| Tier | Bonuses | In game |
|---|---|---|
| 1 | +0.3/s Stamina Drain | Leeches drain stamina and restore it to you on pickup |
| 2 | -10s Cooldown +4 Spirit Power Per Leech | -10s Cooldown +4 Spirit Power Per Leech |
| 3 | +8 Max Leech Stacks +0.3 Damage Per Second Spirit scaling +1m Radius | +1m Radius +0.3 Spirit Scaling +8 Max Leech Stacks |
Each tier is bought with ability points; how many points a tier costs is not in the game files this site reads, so it is not shown. Learning the ability takes 1 ability unlock.
Leech Therapy change history
| Patch | Change | State |
|---|---|---|
| November 5, 2026build 6860from build 6835 | No player-facing change in 9 builds (October 30 to November 5, 2026). | Unchanged |
| October 30, 2026build 6833 | Leech Therapy's Leech Ground Lifetime changed from 180 to 120; Leech Therapy gained 3 Leech Ground Lifetime Per Minute. Leech Therapy's tooltip layout was reworded. | Changed |
| October 26, 2026build 6821from build 6807 | No player-facing change in 6 builds (October 20 to October 26, 2026). | Unchanged |
| October 20, 2026build 6803 | Added to Deadlock. | Added |
Leech Therapy FAQ
What does Leech Therapy do?
Throw a jar of leeches that attach to enemies, dealing spirit damage over time and eating away at the duration of enemy buffs. Its tooltip lists 23 Damage Per Second (+0.19 x Spirit), 0.65s Buff Duration Drain Per Second, +0.6 Health Regen Per Leech (+0.13 x Boons) and +5% Fire Rate Per Leech.
What is Leech Therapy's cooldown in Deadlock?
Leech Therapy has a 30 second cooldown. The tier 2 upgrade changes it by -10s.
How does Leech Therapy scale with spirit power?
Damage Per Second starts at 23 and gains 0.19 per point of Spirit, the coefficient the game file writes on the value. The tier 3 upgrade adds 0.3 to the Damage Per Second scaling.
What do Leech Therapy's upgrades do?
Tier 1: Leeches drain stamina and restore it to you on pickup. Tier 2: -10s Cooldown, +4 Spirit Power Per Leech. Tier 3: +1m Radius, +0.3 Spirit Scaling, +8 Max Leech Stacks.
When was Leech Therapy added to Deadlock?
Leech Therapy was added to Deadlock in the October 20, 2026 patch (build 6803).
Was Leech Therapy changed in the latest patch?
No. Leech Therapy is unchanged in the latest build of Deadlock on file (the November 5, 2026 patch, build 6860). It last changed in the October 30, 2026 patch (build 6833).