Originally posted by blueeyes75:

i have not found him yet and pretty much all of map is open is that good? and when u kill the deer and troll and the others do they respawn after u put their trophy on the rocks

You can summon and kill the bosses as many times as you like, and they'll always drop the same rewards + a trophy. If you see screenshots of people with boss trophies in their bases this is why/how.