Hat of the Alchemist
|A dirty hat. It bears signs of surviving many weird explosions, which suggests it may have means of protecting the head inside from the risks involved in alchemy experiments.|
The hat of the Alchemist is a very desirable artefact for a character with solid AC, providing many useful resistances. The decision is not so clear for low-AC characters, but they will likely want to at least keep it around for certain situations.
Prior to 0.16, it provided only rF+, rC+, rElec, and MR+, but had a +2 enchantment.