AbdulAlhazred
Legend
This is a big reason why 'arcane' is not a power source in Heroes of Myth and Legend. I got real tired of that logic! Martial is a power source, you can muster and practice and enhance the internal 'Chi' to a point where 'stuff happens'. Wizards still exist in HoML as an archetype, they just don't tap into some universal do-all go-to power source. Instead they have to figure it out on a case-by-case basis, but with their deep knowledge of power sources, they have some nice advantages of their own. It makes the various archetypes a lot easier to distinguish (and wizard gets to actually be a bit more interesting itself as being an exception to the normal one-source-per-calling setup).But now you're just back to the tyranny of power source. A magical effect doesn't need to have that restriction, because "magic" as a power source is defined by superseding those limitations. If you have an explicit justification, you don't need to write caveats to get buy-in. A berserker's deep cultivation of anger allows them to eventually inflame the passions of others as they inflame their own, we're done, great, problem solved.
It's why the "mythic" fighter continues not to actually solve the problem; it's not settling on a justification, just describing the desired result.