Obsidian Golem

One of the hardest monsters, ever. 12 feet tall and made of solid obsidian. Only active during the day. Can kill any member of our party with one shot if it gets max damage, and it gets two shots a round. Can fly and shoot a very damaging fiery beam from its eyes. Immune to everything we threw at it save Stone Shape. Can only be hit by +3 weapons. It never missed us, and we often missed it (AC -5).