Although Ruin could just make more of the thing the spikes are for, Promise is deeply unsure that she wants to keep it in Fairyland with her as a general heuristic, and may as well hang on to the mindless version of giving-people-metal-powers. She lines them up neatly piercing her bare arm just enough to hold their magic.

"With the caveat that you may enforce no orders, trigger no prearranged contingencies, tell no lies of commission or omission, and achieve no volume that could conceivably attract attention from anyone who is currently unable or unwilling to act in my interests over yours," says Promise, "you may speak."