A werepire.
NOT, as you might think, the offspring of a vampire and a werewolf.
A werepire is actually the result of a secret US government genetics project from the '70s. The idea was to create hybrids of pre-existing animals, fish and bugs. Some of the results included the shiger, a shark combined with a tiger (perfect for both land and sea combat) and the turtoach, a hybrid of a turtle and a cockroach (excelling in defensive espionage). Out of these hybrids, only one was frightening enough to warrant an almost immediate termination.
This was the werepire. A werepire is a hybrid of a spider and a bee or wasp. Various werepire families include tarantula/bumblebee, wolf spider/hornet, etc. These creatures combined the scariest and deadliest aspects of both species, like bee stingers and spider fangs. They could fly, spin webs, and inject poison through both the stinger and the fangs (the werepire had the spiders resilience, so the creature would not die if it stung something). Scariest of all, though, was that the werepire kept the bee/wasp side's hivemind ability, and encountering more than one werepire would spell immediate doom.
Tactics observed included covering a creature in bites and stings until their blood had literally congealed with venom, trapping a creature with massive amounts webbing and eating them alive, and a unique kill technique in which the werepire would target the enemy's spinal cord and inject a special spider/bee hybrid venom into the spine. This caused paralysis, loss of blood in the extremities, increased heart rate to dangerous levels, and eventually death by loss of blood to the brain.
The geneticists experimented with the original werepire formula for a little while longer, adding elements from other insects like a praying mantis (giving the werepire the ability to turn its head) and a cockroach (giving the werepire immunity from quite a few ways to die). By the end, the werepire had elements from no less than 9 different insects and animals. The spider and bee elements were still dominant, however, so the new, advanced werepire looked exactly the same as the original.
It was at this point that the military stepped in to observe the unusual hybrid. After seeing the potential for misuse, combined with an inability to keep it from attacking EVERYONE, instead of just an enemy force, the geneticists involved were ordered to terminate it. Everything was going according to plan, until three of the werepires flew through the air ducts of the facility into the open. A core breach was called, and the grounds outside the facility were scanned.
Of course, thanks to the chameleon DNA infused in the werepire, they blended in so well that they could not be found at all. After the search was called off, the last the geneticists saw of their creation was an owl found dead with its stomach burst open and trace remains of werepire larvae still in its stomach.
So no, I wouldn't want to be turned into a werepire, mostly because it would freak me out too much.