(This is a rework of my old WWYD from the Hellhound page.)
You and your small group of friends had been chased into an abandoned plantation house by a band of bullies. You ducked into the basement and remained put there for a few minutes hoping that your pursuers would give up the chase. Luckily, there was no sign of them, so you all assumed that you were safe.
There is the moaning sound of a chest being open and one of your friends has a strange book with a picture of a succubus on it. Your other friends assume that the book is probably a piece of fantasy fiction, and think nothing of it. Your friend with the book places the item on a dusty table and opens it to a random page. You take note of how the words seem to be in a different language.
Your friend reads a small phrase, and everyone jerks back when the book glows pink and rises into the air. It begins to spin, and it's speed increases. Additionally, you all can feel the entire house shake.
"Shut it, shut it!" one of your friends cries, but it's too late. The book falls back onto the table and stops glowing accompanied by the house ceasing its shaking.
Everyone is stunned by what happened, and are trying to make sense of the spectacle.
You decide to go upstairs and assess the damage. Everything surprisingly seemed to be in order, but outside, you noticed something different. Instead of the emerald greenery you're accustomed to, there are rocky black plains and a few hills farther back. Not too far from the house, you make out a group of what looked to be females that had ashen-black skin, furry hands and feet, canine-like ears, and fire coming out of their eyes. They appeared to be conversing about something, but are soon making their way toward the house.
Further in the distance is a terrifying sight. A figure rises from beneath the ground covered in lava, but seems to be unharmed by it. An extended time of observation shows that the figure is also female and is now walking toward you.
WWYD?