On her way to deliver mail to Zecora, Derpy got attacked by a vampire, and now she became a vampire, turned evil and now wants to suck everypony's blood.

Edited By: Nebbie

Thank You God for helping me write this.

Credit for the coverart:
Cover image made by Nebbie; wingless Derpy vector by thatusualguy06, surprised Twilight head by tomfraggle, and prone Twilight by littlehybridshila