Reward: 2 Gold
Viking warriors usually walk in groups, they appear every 1 hour in different places looking for a fight, that's their motivation.
Reward: 2.5 Gold
Draugr are "undead" who couldn't enter Valhalla, that's why they keep tormenting everyone here in midgard, they usually appear right after a human dies, so before hunting them try to kill some humans that aren't worthy of Valhalla
Reward: 100 Gold
Ogres are extremely strong and large, they usually walk alone and are found in the coldest areas, they appear 3 times a day, their mission is to hunt and kill them.