There's a rumble from back within the cave, that's likely an answer. If he makes a Perception check, DC 30, he'll notice a number of traps littering the tunnel, primarily easy-to-reset spell-based traps, inflicting a wide variety of disabling and harmful effects, on top of a number of alarm spells, some of them nested to the degree that to disable one means setting off another; the whole process would likely take several hours just to figure out how to unravel, let alone actually unravel.<br/><br/>After about fifteen minutes, when it seems like she might not actually be coming, he'll have a slightly unsettling feeling. A DC 31 Perception check will notice the air currents being ruffled behind him; looking over his shoulder will spot Xendi, currently hovering in the air less than twenty feet behind him, a wicked grin on her face.<br/><br/>If he fails the check, instead, he'll hear the very deep rumble of her voice, directly behind him, and the hot, sulphorous stink of her breath. "Surprise."