A lifeless barren rock. That would be Cetra hell. (No planet to talk to...) And if the lifestream was the heaven, then why didn't the Cetra just stay on the first inhabitable planet? Because every 'living' or life-supporting planet would have a lifestream right? But we know that the Cetra kept moving from planet to planet, which means that those planets have a lifestream in order to support/give life. So why didn't they just settle the first inhabitable planet they came across instead of going to many such planets? I don't believe that the lifestream is the heaven/hell. There's got to be some other explanation.