I just promoted my level 40 Rare Warden, and now he's gone. The "feeder" that I used is still in my heroes, at level 40 and non-promoted. I have a couple other units very close to promotion, but if they're just going to be devoured and lost, hardly see the point. :(
 "Little Bandits"){kind=icon}
 "Sorcery Quest - Guest Edition"){kind=icon}