I've seen a few posts about being able to "save" or "hold" stunt ponts for later. It got me thinking. This was one idea that popped into my head.
Hand of fate/Chosen one
Novice: reroll any one failed spell save. You must keep the second roll.
Journeyman: Gain the hand of fate stunt.
Master: The hand of fate stunt now cost 4 rather than 5.
Stunt: Hand of fate
5 : gain a hero token, heroes can only have one hero token and can't stock pile them.
Any time a hero can spend his hero token to make a reroll, the hero must keep the second roll.
During the heroes turn the hero token can be exchanged for 4 stunt points. These points cannot be combined with other points gained and replace any stunt points rolled for this turn.