Animated skeletons with whip and blade forearms that wear their victims' skin

Skeletal Flayers are animated skeletons whose forearms are replaced with a whip and a blade. Owing to their habit of wearing their victim's skin, they alternately appear as a skeleton or zombie. They fight relentlessly to attack the living in order to harvest skin, which they drape over their bodies, achieving an appearance more akin to a zombie with a patchwork hide. Quick on their feet, the skeletal flayer rushes to attack first with a long whip, grappling a victim in order to begin the grim work of harvesting skin. Such a whip attack does damage only to targets of Armor Class 13 or less, but always holds the target. In subsequent rounds, the flayer begins its butchery, automatically doing 1d6 points of damage with the curved blade. Following the Wrestling section in the Basic Fantasy RPG Core Rules, the victim may escape with a successful save vs. Death Ray, applying the better of their Strength or Dexterity bonuses. When unadorned, a skeletal flayer takes only half-damage from edged weapons, and only a single point from arrows, bolts, or sling stones (plus any magical bonus). Once donning at least one hide, it gains three advantages: +2 points of damage, half-damage from blun