One of the other mages casts a barrier as the poison explodes from the arachnids. Dorian turns the skeletons trying to distract more spiders, trying to swarm them and give the knights openings.

This feels righteous. Dorian feels like he's on the side of good for once instead of a monster or the evil man everyone takes him for.

The other mages keep him protected as he keeps the skeletons alive but there's nothing he can do when the spiders crash through their forms. The spirits inside can't pull bones back together. When the skeletons break the spirits leave and Dorian no longer has control.