okay, so that was a nice chapter... I kind of expected the whole Zeref x Mavis thing after reading Mavis' story.
My theory is...
My first thought was she may have worked with Zeref on theories and methods of resurrection so she can revive Zera...but I'm not sure about that since Zera's body is more than likely deteriorated. It's still strange why Mavis is crystallized. I mean, she's immortal, so it's not like her body needed to be preserved. Maybe she's trying to change her self? To turn her body back to normal so she may find peace in death after a long life, like Zeref. I don't know, just thinking out loud (⌒▽⌒)
I don't think that Mavis is immortal, I just think that her body can't age. She still ages, but her body doesn't show it...or...something?... Now I'm just confusing myself... Meh
when the director said he never heard about Gods sleeping with humans, I instantly thought of Greek mythology lol
Especially Zeus whoops