Acrojacks are ferocious little fiends, similar in size and appearance to sprites or pixies. However, anything remotely beautiful or feylike has been traded in for a nastier and more insectoid equivalent. Membranous wings buzz loudly to support a dense exoskeleton and a long scorpion-like stinger that twitches with electrical energy.

Acrojack swarms utilize this electricity in the building of their enormous hives, as well as the defending of their queen, using their tails like cattle prods. They will swarm assailants and torture them mercilessly until they sizzle on the ground dead.

Acrojacks love the heat, often building their disgusting hives in high-temperature areas such as deserts and volcanoes so that the blood of their prey that they use to build them in conjunction with their own secretions dries into an iron-hard barrier much faster. However, all acrojacks despise the cold with a passion. 

Acrojacks are hive minds, and can convey basic information to one another without needing to speak. However, they do have their own language, though it sounds scratchy and barbaric, like teeth grating against iron.