Pathfinder Mythic Characters get a pool of Mythic Power which they can use to power Mythic abilities & special effects.
Although it's finite sized, variable by character, and ticked off as it's used - there are no check boxes on the character sheet.
Pathfinder core rulebooks (set)
There are only two of us active OS monkeys, a clue on where you envision this addition going would be helpful.
Are you wanting a front page dealio like we do with Barbarian Rage or Paladin Lay of Hands?
I think treatment like Barbarian Rage and Lay On Hands would be superb.
A Mythic Paladin*/Barbarian/Cleric/Shaman/Bard would have fun fitting in all the daily uses!
(* OK either a chaotic Anti-paladin, or a Mythic Paladin with "Beyond Morality", so has No Alignment.)
Okay, so this is no longer an OS request. Becomes a Data request, since Data has complete control over that output.
Enjoy, I think that's all the big items submitted.