Mrotas (aka, Gibbering Cave Imps)
No. Enc.: 1-10 (5-40)
Movement: 30', fly 180'
Armor Class: 4
Hit Dice: 1/2
Attacks: 1 bite
Hoard Class: XI (in lair)
Mischevious, bulbous-headed imps of the underworld less than a foot tall, Mrotas are ugly little bug-winged humonculi that flit about the Vaults carrying messages and scavenging enough to feed their voracious metabolisms. If unable to find food anywhere else they will act in the office of crocodile birds or cleaning wrasse to the larger and more sedentary inhabitants of the Vaults.
Although of limited analytical intelligence Mrotas have a facility for mimicry, a knack for languages, and a wicked sense of black humour. Their high-pitched cackles and whoops of approval echo around the halls whenever some poor fool falls to one of the numerous traps of the Vaults. If their latest playmare proves boringly cautious Mrotas will helpfully bait swarms of bats, stirges, centipedes, or other larger creatures into his path to enliven his day.
Mrotas live communally in paper hives which look like oversized wasps nests. These are usually suspended from the arches of the Vaults and have rusty nails, faeces-stained barbs, broken glass and the like embedded into the outer surface to discourage predators. Mrotas rarely actively gather treasure, preferring to take their payment either in food, or in shiny things.
note: If using FrDave's weapon vs. armour type mod Mrotas are AC I, with a +5 DB from their excellent dexterity and tiny size. They're sneaky little devils, but they squish real good when you hit 'em.