About 1.5 times more efficient in Limited formats
Not the vampire most people would play in a vampire deck. Unless you have pipe dreams of milling your Bloodghasts and Gravecrawlers ….Woah! That comment went from being sarcastic to almost revelatory!
In all seriousness, you probably want to draft this up a lot in Limited as it actually allows you to ‘Cipher’ pretty well. The Keymaster Rogue combos pretty well with it too. It can block a few smaller Boros creatures early on and allow you to survive and perhaps mill out your opponent for the win (what all Dimir limited decks aspire to do).
Go forth and mill little vampire!