1. At Mythic Rank 1, the PC gets a unique Mythic Item. As the PC progresses in Mythic Ranks, the Mythic Item increases in power.
The player will devise what the Mythic Item will be at Mythic Rank 10.
The GM and the player will work together to devise how the initial Mythic Item will evolve over time.
2. At the attainment of Mythic Rank 1, 4, 7, and 10, the PC will get a free boost to an attribute modifier.
If an attribute modifier is already +4 or higher, it takes two boosts to increase it. If the PC gets a partial boost, the PC must boost that attribute again to increase it by 1.
3. At the attainment of any Mythic Rank, the player will devise a Mythic Feat, Ability, or action that, with the GMs approval the PC will get. The Mythic action will be directly related to a Feat, Ability, or action that the PC already has.
4. At Mythic Rank 10, the PC may have a second Apex Item.
Basically, it allows the PC to become more unique through inherent mythic powers.
So, Let's say at Mythic Rank 1, the Fighter gets a Mythic Breastplate. At MR 10, It is an Intelligent item that doesn't allow the PC to be flanked, and that can cast Dimension Door 3/day. At MR 1, it may only warn the wearer to decrease the Off Guard penalty by 1. Etc.
The same Fighter at MR 1, can have a Mythic Raise Shield that is a free reaction that does a Shield Bash to any foe within melee range, when the Shield Block reaction is done.
A mage at Mythic Rank 1 gets a Mythic Pearl of Power. At MR 10, it acts as a crystal ball, that gives the mage an additional spell slot at every available Spell Rank. 1/day it can maximize the dice on any damage die rolls of a spell (e.g., 6d8 would be 48). At MR 1, it gives the mage an additional spell slot at an available spell Rank.
The same Mage at MR 1, can have a Mythic Spell. For example, a Mythic Fireball would automatically have all its damage dice increased by one step.
So, rather than having all the boons be generic, this will allow each player to devise what they believe an overpowered, nearly godlike PC would be.
