"Because I refuse to put Willow into a situation where she is going to be exposed to the depth of the dark magic that this situation will," he said simply. "It would be rather like asking an addict to help bust a cocaine ring. She's done exceptionally well with all the work she's done to recover, and I think the awakening spell has helped her even more, but do you really want to endanger her by dropping her into a cauldron simmering with black magic?" he asked with a raised brow.
He turned the raised brow into a glare as he transferred it to Ethan, huffing deliberately. He was baiting Buffy and he really hoped Buffy's temper was going to be able to hold it in.
But then the glared transferred back to Buffy. "You won't because I won't allow it. Or if he goes, then I shall as well. I promised to keep an eye on him and make sure he doesn't do precisely what you are describing, and I will do what I must to make sure that happens."