Whenever you assume your starry form, you may choose this additional option.

Bull. A constellation of a mighty bull appears on you. Whenever you move at least 15 feet in a straight line into a space adjacent to a target no more than one size larger than yourself, you can force the target to make a Strength saving throw against your spell save DC. On a failed save, you push the target away from you by 5 feet for every 15 feet you moved initially.

When you gain the Level 10 Twinkling Constellations feature, your walking speed increases by 15 feet and your size increases by one category while Bull is active.