Black Pudding

Huge (5’–30’ across), mindless blobs of amorphous black jelly. Driven by ravenous hunger.

AC6 [13], HD10* (45hp),
Att 1 × touch (3d8), THACO 11 [+8],
MV 60’ (20’), SV D10 W11 P12 B13 S14 (5),
ML 12, AL Neutral, XP 1,600, NA 1 (0),

• Immunity: Only harmed by fire-based attacks.
• Division: Non-fire attacks (including spells) cause the pudding to divide. Each hit creates a 2HD pudding that does 1d8 damage.
• Erode wood and metal: Can dissolve wood or metal in one turn.
• Cling: Can move across walls and ceilings.
• Seep: Can squeeze through small holes and cracks.

Source: Classic Fantasy