Harper backtracks through the hall to the door nearest Law (within his segment, at least - Law is very near on the opposite side of Harper's closest doorway - but then again, they're the same doorway) - as do all the hundreds of other Harpers that stretch on to the limit of sight. He steps through the doorway. He feels no magic, no anything - he's simply standing in another segment of the hallway from his perspective, moving in a single step from fifteen feet behind Chance to fifteen feet ahead of Chance. The feeling is nauseating as every fiber of Harper's being tries to reject the impossibility of it.
Everyone can feel the tingle of magic as Law, Chance, and Harper cast their spells (this actually might have something of a grounding effect on them - they can see an endless number of Laws and Chances and Harpers in both directions but only feel four spells go off).
Law and Harper can see the spell hanging over the room thanks to their mage sight.
Harper scrutinizes it: This is, as he probably could have guessed on his own, very advanced space magic. Penrose has taught that spells bear the fingerprint of their casters and Harper thinks he can see what Penrose meant - he's pretty sure if he were to scrutinize the mage who cast this spell he'd be able to link the two together. The spell is very potent and would be difficult and time-consuming to dispel. Further, it's a spell that would last weeks at least. This is high-level magic, much greater than anything he or the others of the group could muster, though he's never had the opportunity to scrutinize Penrose's magic so he can't make a comparison there.
[sblock=Chance's search]Roll: Wits 3 + Investigate 3 - well-hidden 2 = Success with 1 success
Chance finds the hidden passage[/sblock]Law and Chance both converge on the same spot at once - Chance because she's spotted something strange on the floor (perhaps only thanks to her lucky magic), Law because his Find The Hidden Hoard spell has led him there. As Chance had suspected, there is a sign of something odd here: The outline of a square in the carpet. All the hundreds of Laws and Chances bend as one to peel back the carpet, revealing hundreds of trap doors that the pairs all open together.
The trio eagerly pushes its way down the wide staircase revealed beneath the floor. At the bottom of the stairs they find themselves in a living room - to the left of them is the front door of the house, still open from them coming through it, with the front yard and Law's Tahoe outside.
To the right, deeper in the living room, is an older gentleman in an armchair. He's in a knitted shirt and khakis, with a thick grey beard and frizzy hair. He's reminiscent of the actor Harold Ramis and looks like a decidedly liberal version of Penrose. Unmoving eyes stare back at the group through thick glasses. He's not dead - his chest rises and falls with each breath, but he seems comatose, not visibly reacting to the arrival of his three guests. This must be Magellan.
There's nothing unusual about the rest of the living room besides the slight smell of marijuana. Photographs taken over decades dot the walls and shelves of this room, including a large one near a hallway entrance that shows Magellan with what is unmistakably a younger Penrose - the two men are smiling for the camera with four others: There's a pair of what are clearly twin sisters in matching miniskirts and jackets, a third man with slicked-back hair that seems like the manifestation of business casual, and a beautiful red-haired woman, younger than the others and in bell-bottoms and a halter top.
Law and Harper can see a spell hanging over the front door - the same spell that they saw in the hallway - and they can see spells stacked on Magellan. Nothing else in the living room is magical.