In Call of Dragons, Sibyl is a legendary support hero. She has the talent trees: Rally, Marksman, and Control.
Is it worth investing in Sibyl?
Sibyl specializes in sieges, and she is indeed very powerful. Judging by her skills, she will see frequent use in the game. She becomes especially valuable if you already have Maggrat — together they form an excellent pair with strong synergy. So, if you take part in rallies and value battlefield control, investing in Sibyl is definitely worthwhile.