Give every PC a power source as part of character creation, or in T1. This is why the PC is capable of gaining levels and reaching demigod levels of power in a single campaign.
This is true of every PC - Wizards, Warlocks, Sorcerers, Fighters, Rangers, etc.
The character may not know what the power source is (hidden destiny), or might know. That is fluff.
Then attach cool stuff to the Power Source x Class combination.
Note that, as the Power Source justifies your ability to gain class levels, this requires that the Power Source actually justify it if you multiclass. Or you, in game play, gain access to another Power Source.
It is 1000% easier to justify cool non-combat abilities/boons for the destined reborn king than it is for a random fighter.
This does mean that "I'm just a mercenary who is just that tough" isn't a character concept that works. But that is true; "just a town guard" isn't a demigod just because they killed a few dozen orcs and lived to tell the tale. In that case, it is my job as the DM to power-source up the "just a tough dude" in play.
This is true of every PC - Wizards, Warlocks, Sorcerers, Fighters, Rangers, etc.
The character may not know what the power source is (hidden destiny), or might know. That is fluff.
Then attach cool stuff to the Power Source x Class combination.
Note that, as the Power Source justifies your ability to gain class levels, this requires that the Power Source actually justify it if you multiclass. Or you, in game play, gain access to another Power Source.
It is 1000% easier to justify cool non-combat abilities/boons for the destined reborn king than it is for a random fighter.
This does mean that "I'm just a mercenary who is just that tough" isn't a character concept that works. But that is true; "just a town guard" isn't a demigod just because they killed a few dozen orcs and lived to tell the tale. In that case, it is my job as the DM to power-source up the "just a tough dude" in play.