The gesture he himself had used, but that was before the other had something he could not even begin to comprehend pointed at him like it was some sort of weapon. Still, he's more than smart enough to understand the foolishness of his reaction, and taking in a slow breath he drops his hand away from his sword belt.

His eyes remain on the device for a long moment before looking back up to Caesar's face, red eyes tight with frustration at their lack of being able to communicate. The other man is trying, that much is at least certain. The wait is what stands out to him, the care to get permission is such a seldom thing that he nearly misses it.

Then he finally nods, though he still doesn't seem capable of relaxing as he half expects the thing to need to take some of his blood for the spell to work. That, at least, would make some sense to him.