Listen, I'm not saying I wouldn't be surprised if a walrus found its way into my enchanted grotto. But accepting the existence of wave-lore - while admittedly a lot - is the one and only thing you need to do to rationalize it showing up.
But it's precisely because everyone knows that humans are real, mundane creatures bound by well-known limitations that finding one in your grotto would be so shocking. Like, how in Mab's name is a creature without a drop of magic in their blood supposed to even find a crossing - let alone pass through to the other side, part the Fog O'er the Fens, and trod the Path of Winding Stones entirely unassisted?














