Hearing Varnak's mockery, Lucien remained indifferent to it and continued using chantless magic to create ice spikes while using up his mana to recreate those shattered magic barriers.
In his eyes, Varnak was just a clown. Among the three who besieged him, Varnak was the weakest, and even the Ancient Space Dragon is stronger.
If not for Xalvureth attacking him and the Ancient Space Dragon sealing the space and preventing the usage of space magic, Lucien would have already teleported near Varnak and killed him.
As for why Varnak was merely on the defensive rather than joining Xalvureth in attacking Lucien, he knew that if Lucien was pushed into a corner, it would be him who'd be the one to be dragged down along with Lucien's death.
