A race

Blackfire smirked smugly at the Titans, reveling in both their humiliation and her supposed superior naked body. "Well, well, well. I didn't think the creepy girl would go along with this."

"Just tell us what the challenge is," Raven spat.

Blackfire pointed at the city skyline. "My sister and I will race around the city's highest buildings in the shape of our birth star. Then we will come back here. Whoever completes the trial first is the winner."

"Very well, sister," Starfire said. "I promise you will not beat me."

"Good luck, Star," Robin said.

"You got this!" Beast Boy encouraged.

"On three," Blackfire said. "One...two...THREE!"

The two flew as fast as they could towards the city, their purple and green trails streaking through the sky as they ducked and weaved around the buildings. The other three Titans relaxed for a moment, watching them spin around at dizzying speeds.

"I cannot believe I am standing out here like this," Raven said.

"I know what you mean," Robin said. "But we'll get dressed once Star wins this thing."

"Not to be 'that guy,' but what if she doesn't?" Beast Boy asked. "What if Blackfire cheats or something?"

"Then we'll talk to Starfire about that," Robin said. "We won't let Blackfire win."

"Uh, honestly, I'm more worried about what she'll make us do," Beast Boy groaned.

"True," Raven agreed. "She may try to steal my spell books. Or demand to take over the city."

Raven smirked as a thought occurred to her. "Than again, maybe she'll just make Beast Boy eat meat."

In a panic, Beast Boy rushed to the edge of the tower. "GO STARFIRE! YOU GOTTA WIN THIS! GO, GO, GO!"

The two colored trails came racing back to the Tower at breakneck speed. Both of them were neck and neck until the last possible second, when one jumped ahead to touch the roof of the Tower.