The explanation she seeks certainly won't be coming from Peridot. She's already pretty much convinced that this is the right course of action, and she'd rather let the two skeptics phrase their own questions. It does briefly occur to her that between herself, Shima, and Amethyst, they could just release the heart themselves; they only need three people to break the enchantment, after all. But... She wants to see if Childermass and Tyki can be convinced. She wants this decision to be a unanimous one, if that's at all possible.

Rather than saying anything, she confirms Rita's suspicions: She lifts her gauntlet-clad hand up. The stone embedded in it glows briefly, and she summons the fiery egg containing Ignatius's domain into the palm of her hand, letting it sit on display for a few brief moments, before casting it back into hammer-space once more.