It's a stare to make a man sweat, and Felix finds himself holding his breath when she replies. He exhales in a rush.

"Only come to the circle. I've prepared wards to, ah, contain things. Once I summon the atronach and make the connection, you'll be in control of the spell. Not of the elemental, but you can decide how long it stays, and you'll be able to feel what it wants. The musicians and the... ah, sound system, are of course at your disposal."