Tear one end off the hot dogs to look like a severed finger.
Using a paring knife. Cut wrinkle in the hot dog where you joint would be. The carve the end of the hot dog to look like a fingernail.
Place the hot dogs in a 400° oven on a sheet pan lined with parchment paper and cook for 10-12 minutes. This will make the wrinkles and fingernail pop visually.
Whisk together the ketchup and bloody Mary mix to make the bloody sauce.
Place the dogs in a steamed bun. Then Drizzle the bloody sauce in a random pattern over the top.