Kylo holds Geralt's gaze steadily. Without access to his own powers he's incapable of knowing for certain, but it seems, at least, that the Witcher is catching on— if only to the obvious. He's here because Yennefer sent him. It isn't his reach in question here.

"All things are connected through the Force," Kylo informs him, lightly enough. "And reaching through it, distance becomes irrelevant. But it's power you should be concerned with. Isn't it."

The medallion shifts slightly in Kylo's hand. It's entirely possible he means to suggest Geralt come and take it.