The House blade of Aesir, Determination boosts the wielder's mental toughness, making them very hard to sway from their course once chosen. It also gives insight into the nature of obstacles, in order to see how they can be overcome.

Determination remained within Aesir for most of its history, though in the chaos following Logruswrack, Princess Chloe of Amber came into possession of it under less than perfectly straightforward circumstances. She then passed the blade to Random of Arcadia after extracting a promise it remain in the family. While Random would no doubt like to keep the blade, it seems likely she will eventually pass it to Shinobu Minor, who is an adopted member of House Aesir, and possible its rightful heir and wielder, as well as heir to the House itself.