Telesto
What can the weapon do? The Telesto is a fusion rifle that fires Void particles that first stick to their targets and then detonate after a short time.
Why is the weapon so dangerous? The Telesto is not only known for its notorious status as the most broken weapon in Destiny 2; it is also considered one of the most powerful weapons according to its lore. The strength of this rifle lies in the inner workings of its components.
When the Taken King was attacked by the Awoken, the Techians and Mara Sov, the Queen of the Awoken, used a secret weapon: the Harbingers. The Harbingers are an ancient superweapon of the Awoken that is only called upon in emergencies. Why only in emergencies, you ask? Because they were used in the Reef Wars and destroyed the dwarf planet Ceres.
So they are very powerful. Unfortunately, almost all were destroyed in the war against Oryx. A remnant of the Harbingers was found on the Saturn moon Telesto and was subsequently studied. It is very likely that the weapon smiths absorbed something from the Harbingers and incorporated it into the weapon. Essentially, Guardians could also use the weapon to destroy planets.
