That's what I thought too - I even tried verifying that but sadly the media player I was using I couldn't pause the video at the right frame to see the statue in the split second before it becomes enveloped in light, but that is the proof - if it's the Ossurary the statue would be of Thal (with the serpent sword); if it's the Sacrarium it's Nald (who is holding a long tall vase). If someone could verify this it would put this to rest.