Shade
Monster Junkie
It sounds like a corporeal undead, with the ability to assume incorporeal form.
Ghast: 4 HD, Str 17, Dex 17, Con —, Int 13, Wis 14, Cha 16, AC 20
Wight: 4 HD, Str 12, Dex 12, Con —, Int 11, Wis 13, Cha 15, AC 17
Bodak: 9 HD, Str 13, Dex 15, Con —, Int 6, Wis 12, Cha 12, AC 15
Morgh: 14 HD, Str 21, Dex 19, Con —, Int 11, Wis 10, Cha 10, AC 23
These have 8 HD, Int 13-14, and AC 22.
So maybe Str 17, Dex 19, Con —, Int 13, Wis 14, Cha 16?
64 hp (8 hp/hit die) suggests unholy toughness to me.
Ghast: 4 HD, Str 17, Dex 17, Con —, Int 13, Wis 14, Cha 16, AC 20
Wight: 4 HD, Str 12, Dex 12, Con —, Int 11, Wis 13, Cha 15, AC 17
Bodak: 9 HD, Str 13, Dex 15, Con —, Int 6, Wis 12, Cha 12, AC 15
Morgh: 14 HD, Str 21, Dex 19, Con —, Int 11, Wis 10, Cha 10, AC 23
These have 8 HD, Int 13-14, and AC 22.
So maybe Str 17, Dex 19, Con —, Int 13, Wis 14, Cha 16?
64 hp (8 hp/hit die) suggests unholy toughness to me.