A letter from master

(Take place with altered ending is season three for plot convince)
After the skylanders save the academy and skylands once more stealth elf learns that her little sister whisper elf is being sent to her to train early to be a skylander but later stealth elf is turned by a dark power and turns against her fellow skylanders and even sister and mater needs to tackle the problems made now and in the past

Art by gallade65 on deviant art