Ussually, permanent buff spells are around 40 nora (taint, horrific mutation, etc) and they are worst than tales, maybe a duration would be in order?
There it is folks standard cost for permanent effect is 40 nora. so make tales of valor cost 40 nora for a permanent effect or give a turn duration? Will this destroy the powerhouse IS meta?
They usually are not reactive with a " need to be hurt to have any effect clause" though. Just to be fair.