Aster noticed that the girls were done with their task and waved at them, calling them closer. "Come here! Finish off the spiders with me!"
From his experience with using his Legacy Level Magic Carved Seal, he noticed that when he killed enemies with it, the experience wouldn't go to him or anyone else. He was curious as to where it went, though, but he had no time or drive to figure it out.
As such, he started to have the idea of limiting enemies' movements with his ice before finishing them off one by one manually! It was a surefire method, with little to no risk other than the time he was casting!
As he called to them, he didn't delay and pulled his sword, swinging it down on the closest spider while making sure he was staying out of its attack range. After all, some of them still had one or two legs free, able to scratch or wave around.