It’s the final scene of The Valkyrie and Wotan is wearing cords. They’re a sensible choice for a hard-working deity: practical but with a certain retro flair. Slumbering under a red puffer jacket lies his daughter Brünnhilde, and as Wagner’s music yearns and flickers, the Lord of Ravens shuffles slowly around on all fours, methodically attaching the carabiners for the climactic flying effect.