OK - when I think of death, I think how somebody's heart stops beating. When the Slavs thought of death, they imagined Morana/Marena coming and causing a person to stop living. Generally, Morana's job was to take human lives - something like the Western Death that goes around with a scythe. Chernobog was the god of death, darkness, evil, etc., he ruled the underworld and what not, but Morena did the dirty job of "physically" taking lives. In a sentence, Chernobog was the one who would wish for somebody to die and send the death, Morana would be the death that... hmmm... caused people to die. On the creation story, Rod is the one that came out of the primordial egg, then he created the Earth, the Sky, the Underworld and Lada (a.k.a. Rodenica). Lada gave birth to the rest of the gods. Belobog was the one who along with his shadow (Chernobog) created the living things. I am going to check my books on Slavic mythology tonight, and give you details on the gods you want. In the meantime, this website http://www.geocities.com/cas111jd/slavs/index.htm contains a detailed (although not extremely reliable) info that might get you started.