Quartz 5

3 min read

publish: true
aliases:

  • Resonator
    created: 2026-03-09T12:15:34.062-04:00
    modified: 2026-03-09T12:15:34.062-04:00
    published: 2026-03-09T12:15:34.062-04:00
    tags:
  • ttrpg-cli/compendium/src/5e/valdaspire24extras
  • ttrpg-cli/subclass/alchemist/resonator
    cssclasses:
  • json5e-class
    obsidianUIMode: preview

Resonator

Alchemist: Subclass Feature
Source: Valda’s Spire of Secrets Extras (2024)

Class and Feature Progression

LevelPBFeatures
1st+2
2nd+2
3rd+2Resonator
4th+2
5th+3
6th+3Resonant Frequency
7th+3
8th+3
9th+4
10th+4Flashbang
11th+4
12th+4
13th+5
14th+5Reverb Explosions
15th+5
16th+5
17th+6
18th+6
19th+6
20th+6

Use Acoustics to Shape the Battlefield

The explosive force of an Alchemist’s Bomb isn’t just fire—it is a wave that can be shaped and focused. Alchemists who realize this and pursue the science of waves are deemed Resonators for their oft-revisited subject, resonant frequencies. Perhaps such frequencies are at the center of all alchemical pursuits, for with the right frequencies, a Resonator can warp explosions, concuss dragons, and vibrate steel to pieces.

Subclass Features

Playback Device (Level 3)

You construct a clockwork device for recording and playing back audio. You can record anything you have heard within the last minute using this device and can store up to 8 hours of audio. Played back audio sounds identical to when it was recorded, but you can’t use this device to replicate sounds loudly enough to deafen or deal damage. Additionally, you can playback audio up to three times as loud, allowing you to use the device as a megaphone. If you lose your Playback Device, you can build a new one using materials worth 100+ GP over the course of a Short or Long Rest.

Conical Bomb [Formula] (Level 3)

By attaching a waveguide to the exterior of your Bomb, you can change it into a Conical Bomb. This Bomb deals Thunder damage instead of Fire damage. When you use the Bomb’s Explode property, the explosion is a 10-foot Cone originating from the Bomb’s point of impact, extending in a direction you choose. Each creature within the Cone makes a Constitution saving throw, instead of Dexterity. You can extend the cone by 5 feet by expending Reagents as normal.

Resonant Frequency (Level 6)

You have discovered that every material has a resonant frequency, a specific tone that compromises its structural integrity. As a Magic action, you can choose one type of solid material, such as wood, glass, metal, or stone, and begin playing the material’s resonant frequency through your Playback Device. You can stop playing a resonant frequency on your turn (no action required).

When you take this action and at the start of each of your turns while playing the frequency, objects made of the specified material within 15 feet of you that aren’t being worn or carried take Force damage equal to 1d8 plus your Intelligence modifier. Constructs or Elementals made predominantly of a single material, such as metal or stone, and components of objects, such as the metal lock of a door, can also be damaged by a resonant frequency.

Flashbang (Level 10)

As a Bonus Action, you can throw a concussive explosive at your feet. Each Large or smaller creature of your choice within 10 feet of you can’t make Opportunity Attacks until the start of your next turn.

Reverb Explosions (Level 14)

When you prime a Bomb and use its Explode property, you can spend 4 Reagents to create a reverb explosion. If the Bomb deals damage, all if its damage dice decrease by 1 step (d12s → d10s → d8s → d6s → d4s, to a minimum of d4s). At the start of your next turn, the explosion occurs again with the same area and damage, but its damage dice are decreased by a further 1 step.

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