Usually, when you work a spell, you reach out into the environment around you and pull in energy. It flows in from everywhere, from the fabric of life in the whole planet. You don’t create a “hole” in the field of energy we call “magic.” It all pours in together, levels out instantly, all across the world. But the circle about to go up was going to change that. The relatively tiny area inside the Shedd would contain only so much energy. Granted, it would be a fairly rich spot—there was a lot of life in the building, and it had hosted a lot of visitors generating a lot of emotions, especially the energy given off by all those children. But even so, it was a sealed box, and given the number of people present who knew how to use magic, the local supply wasn’t going to last long.

Try to imagine a knife fight in an airtight phone booth—lots of heavy breathing and exertion, but not for long.

One way or the other, not for long.

That was their plan, of course. Without magic to draw upon, I was pretty much just a scrappy guy with a gun, whereas Nicodemus was still a nigh-invincible engine of destruction.

For a few seconds my steps slowed.

Put that way, it almost sounded a little crazy of me to be rushing into this. I mean, I was basically opting for a cage match with a collection of demons, and one that I would have to win within a matter of seconds or not at all—and I hadn’t been all that impressive against the Denarians when I’d had relatively few constraints on what power I could wield against them.

I did some mental math. If the symbol the Denarians were using was approximately the same size as the one at Marcone’s place, it would be big enough to encompass only the Oceanarium itself in the pentagram at its center. Murphy and the others, if they’d stayed where we’d come in, would probably be safe. More to the point, if they’d stayed where they were, they would have no way to enter the Oceanarium.

That meant it would be just me and Ivy and maybe Kincaid—against Nicodemus, Tessa, and every Denarian they could beg, borrow or steal. Those were long odds. Really, really long odds. Ridiculously long odds, really. When you have to measure them in astronomical units, it probably isn’t a good bet.

So, going in there would be bad.

If I didn’t go in, though, it would be just Ivy and Kincaid against all of them. In a deadly business, Kincaid was one of the deadliest, at the top of the field for centuries—but there was only one of him. Ivy had vast knowledge to draw upon, of course, but once she’d been cut off and expended whatever magic she had immediately available to her, the only thing she’d be able to do with all that knowledge would be to calculate her worsening odds of escape.