First, they had to find out where Crumble could meet a dwarf. This wasn’t really tough though because they all knew dwarves loved gemstones and other luxury found beneath the ground. Accidentally, there even was a well-known gold and gemstone boutique in the city, so the owner most certainly was a dwarf. Crumble would make sure just in case.
The most difficult thing was how to make this person either fix the portal himself or get someone else to do this. He would have to talk to him, find out what the quarrel was about and then succeed … Maybe he could lure the dwarf with something they couldn’t resist? But this person already worked in and owned a gemstone business so it would probably be hard to find something as well.
Also, he had to be careful not to ruin the whole thing by acting strangely and maybe making the dwarf angry. If only they had a dwarf friend to ask what the argument was about! If only they could think of an easy solution …