Golems

"Golem" is a broad term that covers many types of magical constructs. Most are humanoid, though they can be of inhuman size. Most require magical means to destroy them.

Clay golem

One of the most dangerous variants — the clay golem is immune to almost all types of weapons. Only magical blunt weapons (hammers and maces) will damage these constructs.

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Source: bg2ee/original_manuals/baldurs_gate_2_ee_amn_survival_guide.pdf — "Some Monsters of the Sword Coast" → "Golems".