Resonance Disc

The Resonance Disc is an item introduced in Risk of Rain 2

The item grants on kill, and when full, fires a projectile dealing   damage, while also piercing enemies. Afterwards, it creates an explosion dealing  damage, ending with the original projectile flying back towards the user, dealing   damage along the way. The initial launch, return of the disc, and explosion all have a Proc Coefficient of 1.

Tips

 * The Resonance Disc will also attack any nearby clay pots or barrels, and will prove fatal if you're in close proximity to one.
 * will charge the Resonance Disc.

Trivia

 * The Resonance Disc in Risk of Rain 2 is equivalent to the Risk of Rain 1 item, Laser Turbine and is actually referred to as the  in the code.
 * In fact, the Lore entry even mentions the turbine by name.