Petros Skeleton--Montporte Dungeon Campaign Critter
Armor Class: 2 
Hit Dice: 5
Attacks: Strike x 2 (1d6)
Saving Throw: 12
Special: Pebble Spray; Constitution Drain; Sleep/Charm Immunity
Challenge Level/XP: 6/400
Petros skeletons are undead human skeletons whose bone structure includes a high proportion of elemental earth. They also accumulate aggregate gravel and pepples, which they are able to use as an attack form. They have the ability to shoot a sheet of flame from their hands. Petros skeletons are treated as wights for the purposes of being turned by clerics.
COMBAT: Petros skeletons are similar to other undead skeleton in combat. They do get two attacks per round, one strike with each hand,
as they are not armed with weapons (weapons interfere with their burning hands ability).
PEBBLE SPRAY: Petros skeletons are able to shoot pebbles in a 20' radius once per day. The pebble spray has an effect akin to canister shot or shrapnel. It does 2d4 in damage to living creatures within the attack radius; half damage if a saving throw is successfully made by each target.
CONSTITUTION DRAIN: Opponents lose one point of constitution when struck by the skeletal hand of the petros skeleton. Lost constitution points are regained at a rate of one point per hour, but an opponent dies if their constitution reaches zero.
SLEEP/CHARM IMMUNITY: Like other forms of undead creatures, petros skeletons are immune to sleep and charm spells.