Moridin it has to be moridin. Why would moridin kill sammael ? Answer, why not the DO isn't exactly Mr sensitive. Also who knows if sammael is dead, Rand himself isn't sure. If moridin made a gateway for sammael with the true source Rand would have no way of knowing. It would be know surprise if Moridin turns up with Three mind traps Sammual, Demandred and Mogheiden. The DO is begining to draw together his forces, he even wants to use Rand. Rand however has a bit of a temper and does'nt like the idea of being controlled. The Do hasn't won yet but I get the feeling that RJ wants to let him get very close (to keep the readers interest) only to have Rand throw a paddy at the end giving his life to save the world.