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|Location||Three Horns - Valley|
|Given By||Dr. Zed|
|True Vault Hunter Mode|
|Rewards||2,398 - 10,900 XP, $1,330, E-tech pistol|
|Previous||Do No Harm|
|Next||Medical Mystery: X-Com-municate|
|Mission Type||Optional mission|
Medical Mystery is an optional mission in Borderlands 2.
The mission is obtained from from Dr. Zed, in Sanctuary. The objective is to find Doc Mercy in Shock Fossil Cavern, and kill him to reveal the truth about his mysterious weapon. The cavern is essentially a tunnel running right through a hill, and is lightly populated with bandits. At a junction in the middle is a third path leading up some stairs and Doc Mercy can be found concealed at the top.
Doc Mercy operates like a nomad armed with an E-tech machine gun. He is slow-moving enough to avoid, but his weapon is quite dangerous to lower level characters. He can be lured out of the cave where a vehicle can be used to run him over if he proves difficult to kill.
Once his E-tech gun is retrieved, Dr. Zed will ECHO some speculation about the weapon. When this is complete, some psychos attack, and these present the first wave of some weapon testing. The E-tech gun appears in the character inventory and needs to be equipped in order to cross testing targets off the list.
- "You had one of your first brushes with E-tech. Things got pretty messy."
- Sometimes Doc Mercy's body will not be searchable after killing him. If this happens, leaving the zone and re-entering should allow the E-tech gun to be taken.
- The E-tech gun to be tested will be returned to Dr. Zed when the mission is turned in.
- Doc Mercy always wears a powerful nova shield, with varying elemental damage, as a deterrent against melee attacks.
- Sometimes kills in one of the Borderlands 2 DLCs will count as a kill for this mission even without using an E-tech gun.