Baptiste (What You Left Behind)

A round, flat shape dug into his back, and he shifted his bag over his shoulder. Wait. He opened it and dug inside, retrieving a disc-shaped device. It was something he’d been working on for months, and it was still just a prototype, but maybe…

[...]

“Not really,” said Baptiste, whipping his rifle out from behind the shipping container. He threw the disc into the air and unloaded his clip into the fusion-energy charging station beside Mauga.
The resulting explosion shattered the air. The middle of the pier was blown into the air, chunks of concrete raining into the bay. Some crashed into the decks of nearby boats, capsizing them. Seagulls scattered overhead, shrieking.
When the smoke cleared, Mauga was gone. Baptiste lay on one end of the pier, battered but breathing. The prototype device hummed in the air, emitting a protective field of energy around him. It was the only thing that had kept him alive.
“Good to know that works,” he wheezed, pressing a button on top. The device powered down, and the ring of energy dissipated. He collected the disc and hobbled toward one of the remaining vessels, a luxury yacht docked at the far end of the pier.