The agreement is quick - too quick. He hears the rustle of fabric as Melkor moves, immediately giving consent to this arrangement. An agreement to stay allies, to exchange information in equal amounts. It's only fair, of course - AM wouldn't expect anything more from a smart tactician. With Melkor's flash of the teeth, AM tilts his head upward, giving an air of haughty indifference to that gesture. He's not going to be intimidated by the likes of his ally.

Mairon agrees as well, quickly after Melkor speaks. It seems they both have an idea of what AM truly wants - especially Mairon, seeing as he has seen AM's memories, knows what he is capable of. Knows what he delights in.

"Well good. Scratch my back and I'll scratch yours, or so they say." So many expressions in the English vernacular that had picked up from observing humans for so long. It's easy to figure out what it means.

With a smile, he gives a brief huff of amusement. "Perhaps I do have my own agenda. But so do you."