[Because everyone love skeletons, especially in the Halloween season. These skeletons are suitable to challenge PCs of rather a higher level than the usual D&D/Pathfinder kind]
Funa-Yūrei
This white robed humanoid skeleton clutches a two-handed ladle. The
stink of the sea is upon this apparition, and water drips from its
sodden robes.
Funa-yūrei are created from the bodies of sailors who died due to the
foolishness of their captains. These hideous undead are surprisingly
organized, capable of forming crews and sailing ships with an ease
envied by mortals. These ghostly crews have only one purpose—drown more
sailors and create more of their kind.
A funa-yūrei attack is typically heralded by a dense bank of magical
fog. Some funa-yūrei attacks commence by ramming the enemy ship, whereas
others are launched by distracting the enemy crew with illusions before
stealthily coming close. Smaller vessels are likely to be flooded from
afar using the water created by the funa-yūrei’s ladle-tipped staves,
whereas larger vessels are boarded and the sailors engaged in
hand-to-hand combat. Funa-yūrei fight with single-minded dedication,
stopping only when they or their enemy crew is slain to a man. Most
ships captured by the funa-yūrei are scuttled, but if an attack is
especially successful in creating new monsters, the undead crew might
split in two and sail their separate ways.
Funa-yūrei collect treasure, possibly as a reminder of their mortal
lives, and their haunted ships are laden with booty. Few are the
adventurers, however, who can battle these undead on their own territory
and claim this treasure without succumbing to endless claws, staves and
blasts of water.
Shores of Swords 