By the time Arvin cleaned his eyes and was able to see Tamaria was not around anymore. While he was blind he was able to sense that when Tamaria pumped some amount of mana in the stone, her mana signature vanished from the spot. Arvin didn't know what had happened?
He tried sensing the surrounding area to see whether Tamaria had turned invisible or she had really vanished from her spot. And to his surprise, he was not able to sense nor able to find anything that could suggest that Tamaria had turned invisible. So that could only mean that Tamaria had vanished from her spot.
