Odonata: Diphlebiidae
Diphlebia euphoeoides
Not just a rockmaster but a stickmaster too.
The Tropical Rockmaster Damselfly didn't appreciate a dragonfly perching in one of its favourite spots and aggressively dispatched it in short order.
After witnessing this, I had to revise my previous impression that damselflies were the more gentle and delicate of the two groups. Not always, obviously.