Infravision is an intrinsic property possessed by dwarves, elves, gnomes, and orcs. Many monsters also have this ability. Humans do not have infravision; to make use of it, they must polymorph into some other creature that has infravision.

Infravision allows a character to detect warm-blooded or fire/ice-based monsters in their line of sight, even if that location is dark. Such monsters are known as infravisible.

Infravision does not detect invisible creatures.

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