The Merciless is an Exotic Weapon in Destiny 2.
It’s a random drop from Quests, Heroic Public Events, PVE and PVP.
Exotic Name: Merciless
Type: Power Weapon, Fusion Rifle
Item Description: Entropy is inevitable.
Special Ability: Conserve Momentum — Non-leathal hits with projectiles make this weapon charge faster until its wielder gets a kill.
Acquired by: Random drop from Quests, PVE & PVP. Can also drop from Heroic Public Events.