Awakening

Kuko's strength naturally wasn't enough to easily seal a satellite such as the moon especially when the satellite wasn't really an anomalous item, his mode of sealing didn't act solely on the object but in the connections it had with the world, his ability manipulated the soul energy of the dead to blur the memories, connection and vision relating to the anomalies he wished to seal, he essentially kept on killing their connection with the outside world minimizing their impact essentially sealing them.