Warning Sign Encounter (OotA Subtable) (d20)

If a long rest is made within 1 mile of this sign, there's a chance the party could encounter demons

Citation

Out of the Abyss Chapter 2: Into Darkness

d20 Result

1-14

nothing

15-16

an invisible barlgura

17-18

Roll 3d4 dretches

19-20

Roll 1d2 shadow demon(s)