Fertile: Get plant breath and blow it on the town's crop fields. Wild: Get plant breath and blow it on every thing you see. Necromantic: Get health breath and heal every body, after stomping on them. Healer: Get health breath and heal every wounded person. Don't heal dead soldiers or you will get "Necromantic" instead. Fiery: Get fire breath. Burn everything but not people. Rampaging: You don't need any special breath power. Eat or stomp everybody. Reclusive: Walk straight, don't jump on, eat, or use any breath power, and stay on top of the castle.
Guardian: Stay on the castle without killing anybody. Tyrant: Stay on the castle with everybody dead. Watcher: Stay on the mountain without killing anybody. Scourge: Stay on the mountain with every body dead.
During the hero segement, grab the bow and press the 'C' key to use it on the dragon. Killing it is very hard, I think the trick is jumping when it tries to stab you with it's tail, and staying far enough away that it can't bite you.
