Icon caduceusstaff
Caduceus Staff
Primary fire: Healing Beam
Ally-targeting healing beam type
50 (60) healing per second
15 (30) m range
10 m radius
Lasts until manually disconnected, or 2 seconds after blocked
Secondary fire: Damage-boosting Beam
Ally-targeting buff beam type
+30% damage dealt
15 (30) m range
10 m radius
Lasts until manually disconnected, or 2 seconds after blocked

Mercy engages one of two beams that connect to an ally. By maintaining the beams, she can either restore that ally's health or increase the amount of damage they deal.
Primary Fire Key: (PC LMB, PS R2, XB RT)
Secondary Fire Key: (PC RMB, PS R1, XB RB)
Switch Key: (PC 1 or PC Scroll, PS RDpad, XB RDpad)


Mercy's Caduceus Staff grants a teammate either healing or damage boosting. She can change to Caduceus Staff from Caduceus Blaster by pressing button 1 (or mouse-scrolling). Primary fire projects a yellow beam that heals the target at the rate of 50 HP per second. Secondary fire projects a blue beam that grants the target a 30% increase to their damage output. Both beams will tether onto the target. The target's name and health will be immediately displayed below the crosshairs.

Regardless of which direction Mercy is facing, the beam will stay locked on the target. As long as its target is within 15-meter range and there are no solid objects obstructing the beam. The beam will, however, remain locked on for 2 seconds before cutting out. Within that 2 seconds, if the connection is established again by staying within the range and line-of-sight, the ability will not be disrupted.

During Valkyrie, the beams have their range doubled and will chain to all teammates within 10 meters of the beam's target, provided they are within line-of-sight. The effects of the beams remain the same, and will not change based on how many teammates the beam is chained to; teammates will still receive 50 healing per second or a 30% damage boost.

Because the calculation for damage happens when a projectile or hitscan connect to the enemies, Mercy is only able to successfully boost her teammate by tethering her secondary beam to her teammates when their attacks connect, not when the attacks are fired.

Mercy cannot target to boost or heal any objects such as turrets, Teleporters, Shield Generators, RIP-Tires, Superchargers, etc. However, she can boost the attack of other objects which are created by abilities by boosting its owner. For example, she cannot boost Torbjörn's turrets by tether onto Torbjörn, while she can boost the effect of a Venom Mine by boosting Widowmaker.

Mercy is able to fill her ultimate charge from both healing and damage boosting. However, she cannot build her ultimate charge if she boosts heroes who are attacking themselves, Mei's Ice Wall, barriers, etc.

In the Game Options, Mercy has two options that affect her Caduceus Staff:

  • Toggle Beam Connection: When enabled, pressing the appropriate button will toggle the staff between 2 beams. Otherwise, the button must be held.
    • When Toggle Beam Connection disabled, players can cancel the ability be releasing the button.
    • When Toggle Beam Connection enabled, players can cancel the ability by either changing to other beam or looking in another direction without any teammate and clicking the button again. The beam can also be canceled by using Quick Melee.
  • Beam Sensitivity: Adjust the sensitivity of Caduceus Staff's targeting. The less value it is, the closer the distance between crosshair and the teammates has to be for tethering a beam.


  • The Biotic Stream of the Caduceus Staff greatly enhances natural reflexes and healing processes.[1]

Patch changes

  • Overwatchemblem black November 13, 2018 Patch: Healing per second increased from 50 to 60 (during Valkyrie)
  • Overwatchemblem black August 9, 2018 Patch: Healing beam reduced from 60 healing per second to 50 healing per second.
  • Overwatchemblem black November 16, 2017 Patch: Increased visual readability of Mercy’s healing and damage boosting beams.
  • Overwatchemblem black March 23, 2017 Patch: [CONSOLE] Fixed a bug that prevented the Damage Amplified value from being displayed correctly.
  • Overwatchemblem black March 21, 2017 Patch: The amount of increased damage that’s done when boosting another player is now tracked under the match statistics and on the Career Profile page.
  • Overwatchemblem black February 28, 2017 Patch: Zenyatta can no longer be targeted when Transcendence is active. New Hero Option: Beam Sensitivity.
  • Overwatchemblem black December 13, 2016 Patch: Console only: Fixed a bug that allowed Mercy to receive Ultimate charge when using her Caduceus Staff to increase teammates’ damage when they’re not damaging enemies.
  • Overwatchemblem black November 30, 2016 Patch: Fixed a bug that allowed Mercy to receive Ultimate charge when using her Caduceus Staff to increase teammates’ damage when they’re not damaging enemies.
  • Overwatchemblem black September 1, 2016 Patch: Healing-per-second has been increased by 20%.
  • Overwatchemblem black July 19, 2016 Patch: Damage boost effect will no longer stacks with bonus damage provided by another Mercy.
  • Overwatchemblem black July 6, 2016 Patch: Fixed a bug that caused Mercy's Caduceus Staff beam to disconnect from its target if the player quickly switched between healing and damage beams by holding down both mouse buttons and/or was facing away from the target at the time of the switch.
  • Overwatchemblem black June 14, 2016 Patch: Fixed a bug that allowed Mercy to gain Ultimate charge whenever damage boosting an ally who was attacking a barrier or Ice Wall.
  • Overwatchemblem black April 6, 2016 (beta) Patch: Mercy’s damage beam will now correctly amplify its target’s damage.
  • Overwatchemblem black April 5, 2016 (beta) Patch: Players can now swap between healing beam and damage beam without losing the beam's target; Added hero-specific option "Toggle Beam Connection".
  • Overwatchemblem black November 20, 2015 (beta) Patch: Damage Boost Beam: Damage bonus has been reduced.


  1. Overwatch Visual Source Book, p.54
Mercy Navigation
General MainQuotesGallerySkins and WeaponsSprays
Abilities Caduceus StaffCaduceus BlasterGuardian AngelResurrectAngelic DescentRegenerationValkyrie
Lore Organizations Overwatch
Character relationships GenjiJack Morrison
Locations Swiss Headquarters
Others Biotic FieldBiotic RifleBiotic Grenade
Media Animated Shorts We Are Overwatch
Comics Uprising
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