Strange has wasted about a third of his arrows in the chase and is looking very put out about this whole matter—partly because of the arrows and partly because, though he hates to admit it, Lambert's right. Just chasing after this thing isn't helpful, especially since the damn thing can turn into smoke. They need a plan. And, as someone who can also turn into smoke, Strange comes up with part of the solution quicker than Lambert.

"If Yrden was able to keep me solid, it should do the same with the beast. The problem, however, is how do we find it and how do we lure it into the trap to begin with."

Because yeah. Fuck if he knows about that point. He's added his useful contribution to the plan and definitely needs something to bounce ideas off of before coming up with anything else useful to the cause.