use fire bolt. even though it should only travel 75-100 meterish. destabilizing that much of the star should cause something similar to this.
I'm sorry, but how exactly do you propose to destabilize "that much" of a star? Via some fairly minor psychic power?
Are we to understand that you suggest an anomaly on the 100 meters scale would be a relevant de-stabilization of a star?
Do you have any concept of how huge a star is?