Roderick stepped back, just half a step, when the lamp exploded. "Seems promising," he said, trying to catch Ollivander's eye as he tidied up the mess. The glare in his eyes was not the clearest way of saying do not fuck this up for him, but certainly the most subtle.
Ollivander, in his defence, seemed quite non-plussed about the whole thing, making a quick note on a scrap of paper. "Happens all the time, young man," the old man warbled. "It's part of the process. The wand chooses the wizard, but I have to find the wand, first." He hmmed and hawed for a moment, before scooping up all the wand boxes. "Definitely upwards of ten and a half, I think," the wandmaker muttered.
Archie turned his head back to Roderick, and the older Macnair shrugged. "No idea, mate," he said. Well, he had some idea - Roderick had aced the wand wood module in Herbology, but it was such a short part of the course, and cores were beyond him. He had a vague notion that Archie would need something without a lot of give, but more give than the family wand. Which was, altogether, not a very helpful assessment.
Ollivander popped his head around a corner. "You didn't get your wand here, did you?" the wandmaker asked, pointing at Roderick. Roderick shook his head. "What do you have?"
Ah, shit. It was an impressive wand, long as he didn't mention the core. "Hawthorn, twelve and an eighth." Softer, he added, "Troll whisker core."
Ollivander pressed his lips together and disappeared again.
It was a long moment before he returned, more boxes stacked in his arms. Hawthorn, Basilik horn, 10-8/10. Elm, 11-1/4, unicorn. Beechwood, 11-1/4, kraken. Elm, 11-1/2, merfolk. Birch, 11-1/4, dragon. Roderick was a little envious, in a nostalgic sort of way - already they were on nine options for Archie. Somewhere in here was a wand that Archie wouldn't have to tame, the first Macnair in a long time to not have to fight his wand.