My Little Pony friendship is Magic season 8 Twilight talking to Princess Celestia

Compare her friend Trixie, a unicorn who doesn't use much magic, but could still use some talents effectively.

Being a Superpower Lottery winner, Starlight Glimmer is severely affected by Anti-Magic, more than most ponies.

This is best shown when she has to go out of her way to keep the jars containing the Mane Six's cutie marks from breaking during the chase, and likely why she never used the spell during it or her battles with Twilight in her return.

She can take cutie marks, but they have to be sealed in a container of some kind or they'll just go right back to the pony they were taken from.

In 'To Where and Back Again', Starlight is forced into this role when the Mane Six and the Royal Family are captured by the Changelings.

In 'The Crystalling – Part 2', Starlight Glimmer proves instrumental to saving the day by managing to talk Sunburst out of his funk and using her magic with Twilight and the other Princesses in the process of fixing the Crystal Heart.

Twilight appoints her as guidance counselor of the newly opened School of Friendship in Season 8, then promotes her to headmare in Season 9. Intrigued by Starlight's magical prowess, Twilight takes her on as her student, and Starlight becomes a recurring character in Season 6, living with Twilight in her castle as she learns about the magic of friendship. However, when she realizes how important the group is to Equestria, Starlight stands down and surrenders. When Starlight is exposed she flees, spying on Twilight throughout Season 5, until she returns in the season finale to get vengeance on Twilight by using Time Travel to stop Twilight and her friends from getting their cutie marks. Starlight Glimmer is the Big Bad of Season 5, featuring in both the premiere 'The Cutie Map' and the finale 'The Cutie Re-Mark.' She felt that cutie marks only led to pain and unhappiness as the differences between ponies pulled them apart, so she created a community where the residents gave up their cutie marks to know 'true' friendship, while Starlight secretly keeps her own cutie mark so she can use her magic to enforce this conformity.

The (unofficial) newbie of the Mane Cast.

My Little Pony friendship is Magic season 8 Twilight talking to Princess Celestia