Advantage and Disadvantage

Advantage and disadvantage stack, and one source of one only cancels one source of the other, not all sources.

That is to say, if you have n sources of advantage and m sources of advantage, resolve as follows:

  1. If n>m, go to 2. If n<m, go to 3. If n=m, roll a d20 as normal without advantage or disadvantage.
  2. Roll (n-m+1)d20, keeping the best one. This counts as advantage for other mechanical purposes.
  3. Roll (m-n+1)d20, keeping the lowest one. This counts as disadvantage for other mechanical purposes.

Example 1: Cindy the human archer is attacking an unaware defender with a bow from long range in poor lighting conditions, while the defender is prone. She has one source of advantage (unaware defender) and three sources of disadvantage (range, lighting, prone), so she rolls 3d20kl1+modifiers to hit and suffers any other effect disadvantage would entail.
Example 2: Jerry the Invisible Mounted Doomrider attacks with a lance at reach against an unaware defender. He has two sources of advantage (lance and invis) and no sources of disadvantage, so he rolls 3d20k1+mods to hit.

Advantage and Disadvantage

To Seize the Throne of the Righteous Sun henkearuw