I'm almost at the Creator boss and now Li was captured and is now paralysed/sedated and kept inside this bubble thing. I have already freed all four spirits (Mithalas Prince spirit, Krotite Warrior spirit,...) and Naija said she now has everything she needs to free Li from the bubble. I noticed that when I sing certain sounds the symbols for them appear to float around Naija along with the spirits, so I guess I'm supposed to sing a song so the spirits can free Li or sth. The only problem is I don't really know which song is that or in what order I have to sing the sounds.