A cauldron or caldron (from Latin 'caldarium,' hot bath) is a large metal-made pot (kettle) for cooking and/or boiling over an open fire, usually attached to a hanger with the shape of an arc. In legend, a cauldron is usually where leprechauns keep their treasure, and also where witches prepare their potions, most notably the weird sisters in the play Macbeth. As a cooking vessel it is mostly obsolete. It is believed that a predecessor of the Holy Grail myth was a cauldron.
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Holy Grail