Database: Hyrrokin

Hyrrokin is an evasive figure in Norse mythology, only appearing once at the funeral of Baldr. She arrived riding a giant wolf with twisted serpents for a bridle, then proceeded to shove the funeral ship into the water with such force that the earth quaked and the rollers beneath it set on fire.

The lady knows how to make an entrance, you have to give her that.

Curiously, several obscure sources I have come across have mistranslated her name as “She Who Lies In Wait.” More than once, in fact. A strange error to make, but perhaps significant?