The Riskrunner is an Exotic Secondary Weapon in Destiny 2.
It’s rewarded automatically for the main mission “Riptide” on Titan moon. After the mission you must speak with Sloane and can pick one of three exotics.
Exotic Name: Riskrunner
Type: Submachine Gun (Secondary)
Required Level: 11
Item Description: Charge your soul and let the electrons sing.
Special Ability #1: Arc Conductor — Taking Arc damage increases weapon power.
Special Ability #2: When Arc Conductor is active, shots fire have the chance to become chain lightning and return ammo.
Acquired by: Beat the ‘Sacrilege’ main mission on IO and you can pick it as a quest reward from Fragment Researcher Ashermir.