Star Dancer by Beth Webb
A great and terrible evil threatens the druids' future. Their only hope is the Star Dancer: a child who will be born under an untimely comet and who is destined to protect them.
As the fated star-shower lights up the sky, the druids are watching. They believe the prophesied boy has arrived. But down in the village, the midwife has just delivered a perfect little girl. Her name is Tegen - and she is the Star Dancer.
Tegen is rejected by Witton, the Chief Druid - but when a visitor gives her a green silk shawl, she begins to work real magic. Near death, Witton acknowledges Tegen, forcing her to abandon her family and learn the spells and rituals of the white-robes. But there are those, close by, who secretly plot to destroy her and take power.
In the great battle to overcome her enemy, Tegen is triumphant - but the cost is terrible. Now the Star Dancer must continue - alone - to fight against the evil that threatens her world . . .