Umber Hulks

Umber hulks are tremendously strong subterranean creatures that can burrow through solid rock in search of prey. They are physically slow, but can cause confusion in their target with a glance.

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