Well I'm getting there with that Orc. Here is what I have so far.
I can't imagine it'll come up in the campaign but it doesn't really need to since it's just backstory to justify the Barbarian instinct I chose, but a white dragon attacked the fishing village my character grew up in and killed everyone except them. For reasons beyond their understanding, the white dragon let them live and forced upon them a small measure of its power but it only ever manifests during moments of great anger. It's almost as if the white dragon wants them to lose themselves to their rage.
Can I be cheeky and ask if you can add the gradual boost rules? Normally I wouldn't ask but I was considering the Fighter for the free archetype at 2nd level but I'd need 14 dexterity and only have 12 currently.