d100 Encounter
90 1 beholder zombie or 1 bone naga
91 1 orc Eye of Gruumsh with 1d4 orogs and 2d8 orcs
92 1d4 ghasts with 1d10 ghouls
93 – 95 A reeking puddle where slimy water has dripped from the ceiling
96 1 otyugh or 1 roper
97 1 vampire spawn
98 1 chimera
99 1 mind flayer
00 1 spirit naga
Underdark Encounters (Levels 5–10)
d100 Encounter
01 3d6 swarms of bats
02 1d4 giant spiders or 1d4 giant toads
03 1 mimic
04 2d4 gray oozes
05 2d10 orcs or 3d6 troglodytes
06 3d6 grimlocks
07 1d6 + 2 magma mephits
08 1 goblin boss with 2d4 goblins
09 2d4 darkmantles
10 2d8 + 1 drow
11 2d10 piercers
12 1d4 minotaur skeletons
13 – 14 3d6 deep gnomes
15 1 druid with 1 polar bear (cave bear)
16 – 17 3d6 orcs
18 1 bone naga
19 – 20 2d6 bugbears
21 – 25 Luminescent fungi growing on the walls of a moist cave, filling it with dim light
26 2d4 specters
27 1d12 + 4 shadows
28 1d3 gibbering mouthers
29 – 30 4d4 hobgoblins
31 – 32 1d4 carrion crawlers