If he was being completely honest with himself, then Draco had more or less given up on his idea with the signatures, definitely feeling that there was something there, but completely without the resources to research it further. This though? This could prove a crack in the case, a realisation that made Draco eagerly grab the vial, keen on studying it and comparing it to the other signatures he had.<br/>“Amazing,” Draco said, clearly impressed by this find. Even if this clearly hadn’t been taken as a proper blood signature, Draco felt certain that it was going to be of immense help to him and his research.<br/>He looked away from this vial and instead allowed his gaze to return to Harry, smile painted wide on his face by now. If he could get this to work properly, he might be able to prove that Harry’s signature has changed without a shadow of a doubt, even if he was still unsure what that meant.<br/>“You’re amazing,” he added as he leant in to press a quick kiss to Harry’s cheek, before his attention was once again back on the vial.