Meanwhile , Dean attempts to kill the Amara with the angel blade onto her but it shatters .
He seems to be an expert about the Darkness and knows how to stop it , but only if Sam accepts to be his vessel again .
Dean attempts to kill the Amara with the angel blade onto her but it shatters .
He seems to be an expert about the Darkness and knows how to stop it , but only if Sam accepts to be his vessel again .