“A dynamic lair is a small dungeon or lair, created in advance like a point of interest, which includes 1-3 encounters.” ACKS page 236.
From Centaurs to Centipedes.
In a Wet, Dark Cave
A fissure in the ground leads into a shallow cave, damp and dark. A nest of giant centipedes make their lair here.
Giant Centipedes x 19 [AC 0, Move 60' (20'), HD 1/2, hps 1d4, #ATS 1 (bite), Dmg 0, SV 0 lv , ML -1, AL N, XP 6; bite causes illness if Save versus Poison fails, for 10 days; ACKS page 159].