Gargoyle

Magical monsters that look like hideous, horned, winged statues. Semi-intelligent and possessed of a great cunning.

AC5 [14], HD4 (18hp),
Att 2 × claw (1d3), 1 × bite (1d6), 1 × horn (1d4), THACO 16 [+3],
MV 90’ (30’) / 150’ (50’) flying, SV D8 W9 P10 B10 S12 (8),
ML 11, AL Chaotic, XP 75, NA 1d6 (2d4), TT C

• Blend in with stone: May be overlooked or mistaken for inanimate statues.
• Guardians: Almost always attack when approached.
• Mundane damage immunity: Can only be harmed by magical attacks.
• Spell immunity: Unaffected by sleep or charm spells.

Source: Classic Fantasy