Gilda remembered that. The first few Clusters they attacked, it was almost a repeat of the first one. Then, they changed their patrol positions, with the next one putting heavy numbers near the Heart; it made the usually successful quick and direct attack unfavorable. Imlay switched tactics on that day, favoring the more griffin approach, and laid waste to the outer perimeter, slowly marching inwards. The Clusters after that began alternating guard positions, as well as increasing their defenders. Some even had flyers that delayed their attack until they could punch a hole to get to the Heart. 