Armour of Valour

'You'll never been cold in it, either by sea or land. You'll never be tired when swimming, never hurt by fire, never troubled by hunger, and no iron will bite you. It will protect you against everything, with one exception.'
'What's that?' said Odd.
'Iron will bite you if you run away,' she said, 'even though you wear the shirt.'
'I've better things to do than run away from battles,' said Odd.

- Arrow-Odd, (Anon., 13th century AD)

The Armour of Valour is a chainmail shirt woven together by secret sorceries. It grants the wearer an immunity to hunger and exhaustion, gives a magical bonus of +4 to armour class, and also a +4 bonus to saving throws against fire-based attacks. However, all of these abilities (except the immunity to hunger) are negated whenever the wearer is fleeing from battle. In such a situation the armour becomes angered by its owner's cowardice - not only is the magical bonus lost, but the chainmail will allow attacks to penetrate as though the wearer had no armour at all. After such a flight, the armour will refuse to be removed as though it were cursed. The normal functions of the armour will only be restored when the wearer enters battle once again.