That left him with the startled spearman, the thing that was flying towards them were the scarabs, from the information that they gave to Hentai, it seems that the two Pseudo Saints knights have used some kind of technique or treasure to increase their speed at incredible degree to the point that the scarabs weren't able to catch up.
Shadowslash knew that this would definitely be detrimental to his plan to slowly build strength on this part of the world but he wasn't that bothered, if the forces from the chaos world comes then he'll just release all of his scarabs and the recuperating One Hundred Poison Worm.
Two forces that are capable of killing Saints would definitely be able to deal with the army of the chaos world, the only thing he was a bit bothered is the fact that the pace of him helping the island recover from their chaos Qi infection would definitely slows down if more chaos beasts or knights arrive.