Resonance Disc

The  is an item introduced in the Hidden Realms Update.

When the holder kills an enemy, they get a stack of for 7 seconds. When they have 4 stacks of charge, the Disc removes all charge and launches itself at an enemy. It pierces enemies as it flies, dealing 300% damage (+300% per stack) to each, before exploding for 1000% damage (+1000% per stack). Finally, the Disc returns to the user, once again piercing all enemies and dealing 300% damage (+300% per stack) along the way.

All these hits have a proc coefficient of 1.0.

Tips

 * Destroying clay pots or explosive barrels will charge the Resonance Disc.
 * However, the Disc can also target and attack them, which can waste its attack and prove fatal if the player is in close proximity to one.


 * Activating the will charge the Resonance Disc.

Version History

 * PC Patch v1.1.1.2
 * Quality of Life
 * Charge Buff Duration: 5s ⇒ 7s
 * Updated Logbook description for more detailed explanation


 * Anniversary Update
 * Major Content
 * Added New Lore Entry:
 * Gameplay Changes
 * Redo firing logic to be more understandable
 * Now grants 1 stacking buff per kill, lasting 5 seconds
 * Now fires the Disk at 4 stacks, resetting all stacks


 * Early Access Hidden Realms Content Update
 * Major Content
 * Added New Item: Resonance Disc

Trivia

 * The Resonance Disc is the successor to the Laser Turbine from the first Risk of Rain, and is actually referred to as  internally.
 * The Logbook entry even mentions a turbine, which is presumably a Laser Turbine.


 * Before the Anniversary Update, the math for was more complex.
 * While holding the, kills generates  spin, visible by the dot in the model flying around. Spin decays over time. Every  th of a second,  . In short, spin decays faster the more time passes between kills.
 * Spin, in turn, generates charge. Charge does not decay. At 100% charge, the Resonance Disc checks all enemies within the blast radius of its nearest target to see if it can hit more enemies by targeting one of them instead. After selecting a target, it will fire according to the earlier description.
 * How much charge is generated from spin is dependent on time since the last kill, and the current spin used as a vertical velocity with   gravity (so upwards).