This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Bergrisar (Norse)
Mountain giants who live alongside the Hrimthursar in Jotunheim. The giants eventually made a home for themself, at a place they called Jotunheim. This place consisted of big areas where nothing could grow, which made it impossible for them to plant any crop. However, there were also big dense forests throughout the landscape, and it was from here they got their food by hunting the beasts and fishing in the lakes.
The relationship between the Aesir and the giants is always tense, and the sagas are filled with stories of theft, deception, and broken promises. But it is only in sagas with Thor present where there is a chance of a fight. Thor really hates the giants, he considers them his mortal enemies, and he will never back down from a fight.