Clay Golems are the second-weakest form of golem in Baldur's Gate II: Shadows of Amn. They are immune to magic and can only be harmed by enchanted blunt weapons, this requirement however, is only likely to be an issue within Irenicus's Dungeon 1st Floor.

They are pretty ubiquitous. Some are guarding the Real Dragon Eggs in the Temple in Ust Natha. They are the same size as Stone Golems, Flesh Golems, and Brain Golems (the brain golems are in the Mind Flayer dungeon in the Underdark and are summoned by the Master Brain. The Mind Flayer dungeon is where you can find the hilt to The Equalizer.)