Resonance Scepter

The Resonance Scepter is a Hardmode post-Plantera staff which has a chance of dropping from the Princess NPC. When used, it creates glowing pink circles at the cursor's location, which expand and then collapse into sparkles over the course of about 1 second. Rapid damage is dealt to any enemies within the circles throughout the animation. It is not possible to summon the circles through tiles. The scepter in the player's hand also sparkles while it is used, emitting pink light.

Trivia

 * The Princess uses the same attack when threatened by enemies, although the weapon is not shown.
 * This weapon is likely a reference to the Vibe Scepter from the game Super Princess Peach.