Relic of the Future: Chapter 66

Jaune tutted and moved on, leaving him. Sienna was the only one, then. He made his way back to her, only to be confronted by a good eight or ten faunus. They were better armed, facing him with determined expressions.

[...]

Dangerous or not, he was still one man and the odds were enough in their favour that they didn't hesitate to charge in. When they came close, he pulled his hand back out and tossed the cooked grenade toward them. It struck the chest of the first and erupted, tearing him to pieces and killing everyone else in a four-metre radius. Shrapnel pinged off Jaune's aura too, weakening it.

—Relic of the Future: Chapter 66