Maybe I'm misremembering

Since Sunny and Nephis have entered the tomb my memory on it is very foggy and I don't think I can read the TOA just for that. So I want to ask some questions. The great river is from the blood of an unholy titan does that make the unholy titan the god of time or something? Also I thought the TOA was made from the unholy titan but it seems like it just nightmare seeds rather . I feel like it's me not remembering the specifics but I don't know. Would be grateful if you could help me