Magnus wants Sunny to win the race, obviously, so he keeps an eye on Galahad and maintains a pace that is plausibly -- to Sunny, at least; probably not to Galahad -- between one and three paces behind Galahad's the entire way to the Mansion -- though he does pull ahead once or twice, just to make it feel like a real nailbiter. (He's held Sunny a bunch. He's pretty sure Galahad can manage this, even without his, like, superpowers or whatever. But he keeps an eye out just in case.) It's harder, in the halls, since there's doors to open and stairs to navigate, but he tries his best.