Bronze Skull of the Ruhkarn:

Each time the wielder of the Bronze Skull of the Ruhkarn, or a unit under their control destroys a unit in a battle, gain a random non-research resource available to them. To a maximum of six resources a war. Rather than gaining a resource, the wielder may instead choose to cause a unit of theirs to instantly regain 1 HP. If the wielder of this artifact ends a session while not at war, they lose a health state. This penalty can NEVER be negated by anything whatsoever.