The Gnome Tretop World - The Interdimensional Gnome, #3

Gnom didn't want to go to the Gnadomacaratszje gnomes alone. He wanted Piotr to join him, and Piotr said, also Tafn would like to come. The witch wasn't sure, it was a good idea. The Gnadomacaratszje tribe was known for grumpiness. And Wolfram asked, what would they say, when Gnom was accompanied by a human and a girl of unknown origin. They were going to buy a bull, and transport it to the iIfnatalitaramizkantarian world in another part of the multiverse.
As a part of this operation, they had to rescue a gnome girl called Buf. Her parents wanted their daughter to marry a guy she didn't fancyThen came the terrible Koros, large birds eating the livestock when it was grazing in the treetops. The gnomes' bows and arrows were to weak to drive them away, and Piotr was assigned the task of getting rid of the menace. Then it was the Mass; a white entity covering mountains.
No one knows what it is, but it grows and grows to such an extend that even the trolls have to flee. Now it was heading for the grumpy gnomes' valley, and had to be stopped. And what was the immortal gnomes doing in their caves inside the mountain?