Beginning from where Sasha was at, the Barrier began to transform.
If it were a peaceful time, Sasha would have thought about hiding her power.
Right now, it is more important for people to be in awe of her than for them to underestimate her.
Every opponent she scared away from fighting with her is one more opponent she need not fight.
Dan may be oblivious to politics, Sasha was not. Dan's previous decision of allowing Snorcs into the Barrier has been very controversial.
Most of the winterland men have lost one or other family member to Snorcs. They could not be given access to the land the same way as winterland men, no matter how useful solving previous conflicts is.
Thus, Sasha decided to make that difference by herself.
Snorcs make a powerful fighting force. If they were not put to use, then they will go pillaging innocent civilians of Winterland. They will robb winterland civilians of the winter stores they have accumulated with sweat and tears over a long time.