[RPG] How does the warlock’s Devil’s Sight eldritch invocation work


The Warlock Invocation Devil's Sight (PHB p108) is described like this:

You can see normally in darkness, both magical and nonmagical, to a distance of 120 feet.

How should this be interpreted, given the undefined use of the word "normally" and the description of a real devil's Devil's Sight ability?

Barbed Devil (MM p.70):

Magical darkness doesn't impede the devil's darkvision

Best Answer

The Text is Clear

The Devil's Sight invocation reads simply:

You can see normally in darkness, both magical and nonmagical, to a distance of 120 feet.

Dim light is not mentioned, but is mentioned in every other form of Deprovision given to player features. This omission means that there is no benefit from the invocation until you get into actual darkness.

So, what "normally" means is that you can see if there were light; in full color, with no disadvantage imposed to attacks or sight based skill checks for reasons of darkness.

The Monster Manual definition of Devil Sight is specific to monsters with it, and don't apply to Warlocks, it doesn't change or affect how the invocation works.

Designer's Intent

Jeremy Crawford answered a question like this on Twitter in November 2015. while his tweets were still considered official rulings. Jeremy Crawford confirmed that Devil's Sight us meant to kick in only in total darkness. When asked:

Devil's Sight invocation gives you no benefit in dim light and full color vision in darkness. Intended?

He responded:

Devil's Sight is meant to be an eerie ability: "Douse that candle so that the Dark Powers will lend me sight."

It is the designers intent that Devil's sight allows you to see in total darkness as if it were full light, but gain no bonuses in dim light. Other sources of darkvision would still apply.

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