Go meet her friends.

You hesitantly step out of the cab to go meet some new friends. They're a little eccentric, some of them having hobbies like extreme body modification or model trains, but they're generally a very nice lot. They even offer you to hold the blade through the ritual sacrifice. When you slay the goat, a dark god rises from the animal blood.

"Hey, buddy," the evil presence says, "first time summoning the forces of darkness?"

"Sure is," you say, "I'm actually a little nervous."

The entity chortles, a deep sound that roars like hellfire. "Well, welcome to the club. How about a wish to get you started? I can give you either a corporate empire or a pony. What do you think?