Quartz 5

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  • Infernum
    created: 2026-03-09T12:15:34.015-04:00
    modified: 2026-03-09T12:15:34.015-04:00
    published: 2026-03-09T12:15:34.015-04:00
    tags:
  • ttrpg-cli/compendium/src/5e/valdaspire24extras
  • ttrpg-cli/subclass/investigator/infernum
    cssclasses:
  • json5e-class
    obsidianUIMode: preview

Infernum

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

Class and Feature Progression

LevelPBFeatures
1st+2
2nd+2
3rd+2Infernum
4th+2
5th+3
6th+3Infernal Bargain
7th+3
8th+3
9th+4
10th+4Binding Contract
11th+4
12th+4
13th+5
14th+5Fiendish Transformation
15th+5
16th+5
17th+6
18th+6
19th+6
20th+6

Bargain with Fiends for Infernal Powers

The Infernum are Investigators in league with Fiends, either willingly to pursue nefarious ends or unwillingly as the result of an infernal bargain. Each is given a set of enigmatic goals and a fiendish overseer (often an Imp), then left entirely to their own devices. Many search and scrounge for a solution to their fiendish bargain or opt for malicious compliance, delivering upon their infernal directives while undermining their broader schemes. Others, however, revel in their dark alliance, gleefully hoping to climb the fiendish ranks.

Subclass Features

Fiendish Familiar (Level 3)

Your infernal masters have assigned a lesser fiend to supervise and assist you. You add Find Familiar to your grimoire for free. You can use Rushed Incantation to cast the spell without expending a use of the feature, and you don’t need to read from your grimoire to cast it. The spell is improved in the following ways when you cast it.

Fiendish Options. You can choose only the following options for your familiar: Imp, Quasit, or Pseudodragon. A pseudodragon summoned with this spell knows Common and is a Fiend.

Spiteful Distraction. As a Bonus Action, you can command the familiar to disrupt an enemy within 5 feet of it. The target has Disadvantage on the next attack roll it makes before the start of your next turn.

Trinkets (Level 3)

You can use the following trinkets.

Demon’s Eye. As a Bonus Action, you gain the ability to see normally in Dim Light and Darkness—both magical and nonmagical—within 120 feet of yourself for 1 minute.

Diabolical Barb. You can cast Hellish Rebuke without a spell slot or components.

Hexagram Pendant. You can cast Hex without a spell slot or components.

Infernal Bargain (Level 6)

When you finish a Long Rest, you can strike one of the following bargains with your infernal masters. You can also discuss new bargains with your GM. The bargain lasts until you finish a Long Rest.

Blindsight and Blindness. You have Blindsight with a range of 30 feet. Beyond this range, you have the Blinded condition.

Damage and Actions. Once on each of your turns, you can choose to take Necrotic damage equal to twice your Investigator level to take an additional action. This action can only be used to take only the Attack (one attack only), Dash, Disengage, Hide, or Utilize action.

Resistance and Vulnerability. Choose two of the following damage types: Acid, Cold, Fire, Lightning, Poison, Psychic, and Thunder. You have Resistance to the chosen damage types. The GM chooses another type from the list; you have Vulnerability to that damage type.

Binding Contract (Level 10)

You add Geas to your grimoire for free. When you cast the spell using this feature, you can modify its casting to draft a binding contract. Instead of giving a verbal command, you write a legal contract that can contain up to 10 commands and conditions. You can include clauses that end the spell early or extend its duration to a maximum of 90 days. Instead of targeting a creature that you can see within range, the spell targets any creature that signs the contract within the duration.

A creature that willingly signs the contract as a Utilize action automatically fails its saving throw against the spell, whether or not the creature understands the nature of the contract.

Fiendish Transformation (Level 14)

You can take a Magic action to shape-shift your Fiendish Familiar into one of the following forms: Barbed Devil, Incubus, Succubus, or Vrock. It remains transformed for 1 minute or until you end it (no action required). While transformed, your familiar can attack.

Once you use this feature, you can’t do so again until you finish a Long Rest.

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