From the publisher's website. Reginn, son of Hreiðmarr (king of dwarves), was a dvergr (dwarf) of not only great size, but of skill and wisdom. Dark in spirit and versed in magic, Reginn created a testament to himself in Sjaudvergrhall (“hall of the seven dwarves”)—a series of trials meant to test the bravest and most heroic of men, while proving the superiority of dwarvenkind.