Take a wyvern to Bee Cave on Crystal Isles. Go down to one of the bottom entrances and slowly move it in. Use the breath to kill the bees and bite if they get too close to kill them. Once most of the bees are done, bring it into the cave and kill the Bears. When it is clear, use a chainsaw on the hives and you'll rake in the organic poly. If you want honey use a bear or a metal pick on the hives instead.