Got her CR2/SU5 after feeding 10-11 copies. Meh, at least I got enough Leeannes and Laurens to AW both Bernice and Spica. The drop rates in this event were brutal. I think I spammed Shells of Destruction like over 20 times just to get 2 Laurens. And 5 of the copies were from Momiji finally deciding to drop on the last day.