Lily and Sparkle continued to go on many adventures together, exploring new lands and meeting new creatures. But one day, as they were flying over the kingdom on Sparkle's back, Lily noticed that Sparkle's once bright and powerful horn was starting to lose its shine.

"Sparkle, what's wrong?" Lily asked, worriedly.

"I'm afraid my magical powers are starting to fade," Sparkle replied sadly. "I don't know why, but I can feel it happening."

Lily knew she had to do something to help her friend. She remembered the special flower they had found on their first adventure together and wondered if it could help restore Sparkle's powers.

"Let's go back to the castle and see if we can find another one of those special flowers," Lily suggested.

They flew back to the castle and searched the royal gardens, but they couldn't find any more of the blue flowers. Lily was starting to lose hope when she remembered something her mother had told her.

"Mother always said that the most powerful magic comes from within," Lily said, looking at Sparkle. "Maybe we just need to find a way to unlock your own magic."

Sparkle looked at Lily with a glimmer of hope in her eyes. Together, they went to the royal library and searched through books on magic and unicorns. Finally, they found a book that had a chapter on unicorns losing their powers.

According to the book, unicorns could lose their powers if they were feeling sad or lonely. Sparkle realized that she had been feeling a bit lonely lately, as she was the only unicorn in the kingdom.

Lily knew what she had to do. She went to her parents and asked if they could find another unicorn to keep Sparkle company. The king and queen were surprised, but they knew how much Sparkle meant to Lily and they agreed to help.

A few days later, a new unicorn named Glitter arrived at the castle. She and Sparkle became fast friends and Sparkle's powers started to return. Lily was overjoyed to see her friend happy and powerful once again.

From that day on, Sparkle and Glitter became the best of friends and they, along with Lily, went on many more adventures together. And Lily learned that sometimes, the most powerful magic of all is the magic of friendship. The end.