Create a dynastic rule called “Experience” with the following text:

Each Valkyrie shall have an Experience statistic, to be tracked in the GNDT.  Each Valkyrie’s Experience statistic will start at 0.  Whenever a Valkyrie wins a skirmish, she receives a number of Experience points equal to DICEX, where X is the Valkyrie’s Skirmish Rating.  If a Valkyrie wins a skirmish with a Skirmish Rating of 0 or less, she receives 1 Experience point.

A Valkyrie may use Y Experience points in order to raise one statistic, except Tinkering, of one of the Einherjar she has recruited by 1 point, where Y equals half of eleven more than the current value of the statistic to be raised [Y=1/2*(current value +11)] rounded up.  No Valkyrie may raise an Einherjar’s statistic whose value is +10.