The Veylon

The veylon are spirit mobs that float towards players dealing a half a heart of damage. then recoiling and vanishing. They float through blocks like vexes but cause a random bad effect to the player. They appear near bedrock, spawn on full moons, and have a small chance to spawn after slaying any hostile mob. They take no knockback and to harm them you need to enchant a weapon or tool with spectral touch. When you defeat them they drop sprites. Sprites are used to craft the invisibility cloak. To craft it you have to place leather on both bottom sides of the crafting table like you are making boots, then one on the top row in the middle, then two sprites in the space between. The invisibility cloak grants the user permanent invisibility, and slowness for the duration you wear it. The cloak is very frail and drains durability just by using it. It grants no armor and takes up the chest plate section of your player. Veylon are not scary and emit groans similar to zombies but with more reverb. Hopefully you like the idea enough to add it, or even just let this post exist. Thanks for reading!