[RPG] How to determine the spell save DC of a monster/NPC


I am currently DMing a 5e homebrew campaign, and I was looking at the Drow monster stat block.

They have innate spellcasting abilities and one of those spells is Faerie Fire. In the description, it states that the targets must make a Dex saving throw or be outlined in color.

How do I determine the DC that is needed to pass the Dex saving throw against the Drow's Faerie Fire spell? It is not stated, and I am just a bit confused as to how to arrive at this number.

Best Answer

DC 11

The Monster Manual entry for the Drow states under Innate Spellcasting (emphasis mine):

The drow’s spellcasting ability is Charisma (spell save DC 11). It can innately cast the following spells, requiring no material components.

Generally, the spell save DC will be listed in a similar section for all monsters with Innate Spellcasting.