Umm, I don't see any guides explaining how to summon Thanatos...either I missed them completely, or there really isn't any o.O . If there is one, i'm sorry to have missed it in my search, just point me in the right direction with a link, or whatever floats yer boat =]
Thankee ^.^
http://write.ratemyserver.net/ragnoark-online-quest-guides/thanatos-tower-quest-guide/