From Destinypedia, the Destiny wiki
Prometheus Lens is an Exotic Solar Trace Rifle introduced in the Curse of Osiris expansion for Destiny 2. The weapon generates a damage field of intense heat the longer it is fired, and kills return a fraction of ammo spent (Around 1/3).
How's it work? Ha! The underlying principles are quite simple, really. The gun's pyreliophorite crystal—
Photovoltaic? It means "regarding the conversion of light into electricity."
No, no, the gun doesn't create electricity; the gun induces an external combustion reaction. It's perovskite that—
I just explained the perovskite! If you'd stop interrupting—
Wait. I remember you. You're one of Cayde's Hunters! Get out of here! Shoo! The Cryptarchy wants nothing to do with you!
This trace rifle can be used effectively to clear out lots of low-health enemies, along with damaging Majors with solar shields and Ultras with the weapon's heat field. With a recent 10% damage buff in Update 2.1.0, it performs very good in both PvE and PvP, although it's often outgunned by weapons such as Luna's Howl and Telesto. Shotguns are also particularly dangerous, since players with these weapons can rush and kill the wielder very quickly.
List of appearances