From publisher blurb:
This booklet contains information about a new monster: the Skelettin.
This formidable monster is a giant-sized, two-headed brute. A Skelettin is an animated skeleton of a regular Ettin, typically garbed and armed in a manner similar to that in life.
Includes four complete statblocks of crunch to support a wide variety of difficulties, so you can insert a "scaled" version of this monster into an adventure or campaign of ANY PC level.
Also includes rules to use this Quadded Statblock feature.