Ursalua  

One of the scouts, Scout Madu, gives a quest for some nice armor, all classes I believe , the chest armor requires a drop from the named bear, Ursalua.
This mob shows up after you clear out the cave and plains area of the regular mesa bears. Ive only seen Ursalua spawn outside the cave so far, but guess he can spawn anywhere the regular mesa bears do.
chest piece has regen 2 and mana regen 3 on it, example is the Rune Tailored Cloth Robe.
Did this quest with a 61 chanter and took about an hour to spawn the named bear. Your mileage may vary.