Now may not be the time to mention that Peridot has never actually killed anything before in her entire life except maybe a few robonoids, given that gems reform when they've been poofed and she's never really had cause to shatter anything herself.

But it isn't the time to mention it, nor does it even occur to her, as she grabs for the knife. "Yes! Gimme." The knife balances just above her hand, hovering, as her expression goes gravely serious. "Just like the fruit ninjas."

The pygmies lunge from all sides and Peridot waves her hands, guiding the knife in a ranged attack towards one of them. It sticks strongly in its chest, causing it to dissolve into dust, which she takes to mean they can just be poofed like gems. Excellent.