The title "Ex Nihilo" literally means "From Nothing", alludes partly to the creation account, but refers mainly to the rise of God's followers in the book of Revelations, specifically from Chapter 20 onward.
"Arise from death", like lyrics in many of the "Apocalyptic" songs on Terminate Damnation, refers to the rise of all Christians who died in the past for following Jesus, as written in Revelation 20:4
"A new creation" refers to the new Heaven and Earth God creates in Revelation 21:1, after Satan, the Beast, the False Prophet, Death and even Hell itself are cast into the Lake of Fire.