Not so long ago you stumbled upon an old book at the library. Literally, as it fell to the ground and you nearly fell over it. At closer inspection you find it is full of spells and other magical stuff. Out of curiosity you take it home where you read through it until...

Just as you thought you saw it all you find a page with instructions for a summoning. The instructions are oddly specific and full of warnings. But ignoring that it's an instruction for summoning!

Without much further ado you collect everything needed, really weird and gross stuff, and get everything ready. Then, you go through the summoning process, step by step. After the last step the room fills with red smoke. At the middle stands suddenly a figure with an unsettling smile, antlers and dressed in mostly red.