I'd think it would be an emergency measure for desperate times. Even then, it would be an emergency measure that only a war clan would take. That is, a peace or balanced clan, in an emergency, might elevate an Orlanth Adventurous champion to the post of clan chief; a war clan might routinely have Orlanthi warriors as clan chiefs, but in a truly desperate situation might go all-out and appoint a Humakti as chief for the duration. And as soon as the crisis was over, they'd toss out the Humakti like Winston Churchill.
Powered by hypermail