1) A PC gets Mythic Points equal to its Mythic Level. These Mythic Points reset upon a night's rest/long rest.
2) While a PC has Mythic Points, then:
2a) Add the mythic level to proficiency. This is a small, but measurable, improvement to AC/Attack/Saves/Checks.
2b) Roll a d12 at the beginning of the turn. If the d12 is equal or less than the PCs mythic level, they are quickened as per the 3rd level Haste spell for one round.
2c) Decrease any flat check by the mythic level.
3) A player may spend a Mythic Point to do the following:
3a) At the beginning of their turn, they may increase all non-d20 dice by one step for that turn. d12s may be increased to d20s.
3b) Before the results of any check or save are announced, add xd4 to the result, where x is their Mythic Level.
3c) After a roll which critically fails, change the critical failure to a simple failure.
3d) Change the dying condition to unconscious.