Grey had his eyes on the Gnomes, not taking any actions. It was not that he did not want to take action, it is just that he was discussing with Klaus and the others the best way they could take advantage of the fact that he could cut off the connections of these Gnomes and their Puppets. As long as they were careful enough, they should be able to kill these Ninth stage Sovereign Gnomes without suffering any kind of injuries. Although this was not the first time Grey was facing off against Ninth stage Sovereigns, among the group, he is the only one who can definitely overpower his opponent, the others can only hang on against their opponents. If they could deal with their opponents, they would not have spent so long fighting with them.
The four Ninth stage Sovereigns separated from the Fifth stage Sovereign fighting against Hugh. At the same time, Hugh also gave Grey and the others some distance.
