Create and guide the snake

You chant the words and pour a jar of fresh blood out into the dirt creating a black snake, it looks at you curiously and before you can say a word it flicks out and bites you causing a flash of pain and your balls to swell.

"Fuck why did you do that I thought you were supposed to be under my control?"

The monster you have created makes an awful noise it takes you a moment to realize is snaksh laughter "I saw what you wanted and you will need that now take me to the girl." it curls around your leg and seems to vanish pulling up your pant leg you see that you now have a snake tatoo on your ankle.

You are a little worried as you head to the school, the snake doesn't seem to be taking orders exactly but he seems to be doing what you "want"