You may also be looking for the song Age of Shadows/We Are Forever.

Age of shadows

Planet Y is dominated by giant machines.

The Age of Shadows was a long and dark period in the history of the Forever race. Beginning sometime 6 billion years ago on the planet Y, the Age of Shadows saw the Forever reach a tipping point in their cultural and technological development where they became so reliant on machines to run their lives that they became biologically immortal but in the process lost the ability to feel emotion. (Age of Shadows/We Are Forever, Liquid Eternity) Eventually most even lost their identities, however one seemed to retain some degree of individuality. (Out of the White Hole: "Planet Y")

The era lasted until 2112 when the New Migrator rekindled their capacity for emotion and ended their dependence on machines. (The Memory Remains)