The violet star at the center of Lith's life force received the energy from the smaller ones through the thread, amplifying it before sending it back to them. The red energy allowed the stars to resonate with the void and to beat with it in unison.
The darkness didn't just feed upon the stars, it also kept them apart so that each one of them could grow without colliding with the others.
'It seems I'll need Faluel's shapeshifting lessons sooner than I expected.' Lith inwardly sighed after failing multiple times to change his form without magic.
'Maybe, and maybe not.' Solus pondered. 'My guess is that the red thread is the remnant of your human side. You didn't lose it, it just changed. Try to focus on that.'