Relic of the Future: Chapter 9

His job was just to watch the door and make sure no Grimm snuck up on Delta and Echo. He glanced towards them to see how far along they were in priming the strange explosive device.

There was a machine behind them with several tubes of liquid in, and behind that – an odd, shadowy shape. It waved from side to side ominously, and then twisted through the tubes.

"Get down!" Jaune leapt over to them in an instant and tore Echo away from the charge, throwing him flat on his back. Delta yelped and fell too, and that might have saved his life as the object burst through the tubes, showing them in glass and water as it hooked forward with a wicked barb. Jaune was able to block it with his sword, but it bounced off and hooked around – scraping along his inner arm.

It was a tail, a scorpion's tale. But this was no Deathstalker, he knew.

[...]

Tyrian Callows stood before him, younger, with his tail once more, and no less dangerous for the difference.

—Relic of the Future: Chapter 9