"Extradimensional mansion is a seventh-circle -" Sigh. "Backing up. The kind of magic that you don't need any innate aptitude for involves using a magical spellbook in which you can stabilize spells in advance, and then cast them on the fly as situationally appropriate. People who do this are called wizards; I am one. Spells developed this way are very discrete, compared to the magic of your world, because only certain configurations are stable." He flings up an illustrative illusion. "First circle spellform looks like this, second like this, third like this, fourth like this, fifth like this." They get nonlinearly more complicated. "I can't concentrate on seeing them at the same time as I cast them but Vanyel can and so we've been playing around with them a bunch.
If you're a seventh-circle wizard you can create an extradimensional space luxuriously appointed as a mansion complete with servants. Clepati is and I bet she wouldn't have minded and then we wouldn't be camping out here in the sand like a bunch of commoners.
Fox's Cunning is a spell that enhances intelligence. I feel like we could use it, right now. I have a headband for it but I'm going to forget some of my spells if I take it off."