Page 120 of Faiths & Avatars, AD&D 2nd edition.
Quick stat block
The Abomination is a Fighter 30.
AC -4; Move 7, Climb 5, Swim 7, Fly 27, HP 216; THAC0: -1
# of Attacks & Damage in text
MR 30%; Size: G (varies)
Str: 26, Dex 16, Con 24, Int 10, Wis 10, Cha 1
Spells: None (See text)
Saves...