Sheet Phantom (CR 1)

Medium Undead
Alignment: Chaotic evil
Initiative: +3 (Dex); Senses: darkvision 60 ft. and Listen +8

AC: 17 (+3 Dex, +4 natural), touch 13, flat-footed 14
Hit Dice: 3d12 (20 hp)
Fort +0, Ref +3, Will +0
Speed: 20 ft., fly 20 ft. (perfect)
Space: 5 ft./5 ft.
Base Attack +1; Grapple -4
Attack: Buffet +3 melee
Full Attack: Buffet +3 melee
Damage: Buffet 1d4+2 subdual
Special Attacks/Actions: Smother, improved grab
Abilities: Str 15, Dex 16, Con -, Int 10, Wis 10, Cha 15
Special Qualities: Undead, immune to blunt weapons, weaknesses
Feats: Blind-fight
Skills: Listen +8 and Move Silently +16
Advancement: 4-6 HD (Medium-size); 7-9 HD (Large)
Climate/Terrain: Buildings
Organization: Solitary (1)
Treasure: None

Source: Dragon #287

A sheet phantom is the undead manifestation of an evil person who died in bed, embodied in the bed sheet that covered the corpse. It has no facial features save two glowing, green eyespots. Sheet phantoms glide effortlessly through the air by an innate form of telekinesis.