He startles at that unexpected display of strange magic, certainly unlike anything he has seen wielded by the mages of any Circle he's visited. A type of force magic, perhaps? Fascinated, Octavius leans in with wide, inquisitive eyes to examine the crystal where it hovers above Vlast's palm, only to jolt like a skittish foal and stumble backwards when that voice reverberates through the air around him.

"Kaffas--" he swears the oath under his breath unthinkingly, then looks back to Vlast in incredulous shock. It takes him a second or two to realize he's been asked a question, and he tries to get it together long enough to answer. "No one called you here. You came here through a rift in the Veil, and we found you. 'We' being Riftwatch--this organization. We... watch the rifts." A slight wince. Well, it's an apt name.