Isidor has seen Felix at other parties; glimpsed him talking to Zandros Alter, even. She's seen his charming smiles before. Smiles that come a little too easily and promise a little too much. This is different. His smile is smaller, almost secretive when he meets her eyes.

"It's a rare pleasure to... use my magic for someone who understands." At least when it comes to fire elementals. Few people could be so readily attuned to such an alien being. Felix has had many years of practice, for his part, and he still finds other atronachs easier to commune with. Flame atronachs are fun, though.

He won't rub the moment in Isidor's nose, however much he wants to clap his hands in glee for pulling this off. He makes himself pause thoughtfully instead. "Typically a generic summoning calls one of them more-or-less at random. However, a skilled conjurer can make arrangements... even pacts... with individual daedra. Knowing her name, I can call on this her again, if I choose."