He nods. By all means, he welcomes Kaz's company; he was one of the first people Altaïr met here with some sense.

"I'd like to know when they began their summoning, and in what order." He drums his fingers on the surface of the table, considering. "If one faction was the first to begin the practice, they may have advanced knowledge. If they all began around the same time, that implies coordination. Or a mutual discovery of whatever allowed it."