Here's a monster I cooked up for the new Hex Crawl Chronicle (coming soon!)
Since it's for a HCC, it's in the good old fashioned Swords & Wizardry format.
Storm demons resemble large, blue-black crickets with glossy carapaces. They have six limbs, the bottom two serving as legs and providing them with an impressive jump. A storm demon’s jump carries them up to 50 feet, and they can jump and attack, gaining a +1 bonus to hit and damage when they do so. The demon’s other four limbs are used for combat, the upper limbs for attacking with hook-like appendages, the middle two generating lightning bolts (see below) or attacking with weapons, for the middle limbs end in something like humanoid hands.
Storm demons can generate lightning bolts by rubbing their middle hands together. They must rub their hands for at least one round, and then can release the lightning in the next round. The lightning bolt has a 100-ft range and does a number of dice of damage equal to the number of rounds the demon spends generating it.
When flying, a storm demon’s wings disrupt the atmosphere, summoning fierce lightning storms in a mile radius.
A storm demon has a 10% chance to gate another storm demon to its assistance.
Storm Demon: HD 8; AC 0 ; Atk 2 hooks (1d8), 2 weapons (1d6) and mandibles (1d6); Move 12 (Fly 24); Save 8; AL C; CL/XP 11/1700; Special: Magic resistance (45%), agitate atmosphere, lightning bolts, immune to electricity.