Vampires Train Keeps on Rolling! | Rakdos Vampires Pioneer League 

They only very lightly use their graveyard. Newer builds don't win via graveyard very often thanks to Archdruid's Charm. It can stop a few things, but their core gameplan is unaffected.

Leyline is a card that most people misunderstand. Like Rest in Peace and other similar cards, you only want them against decks that rely heavily or completely on their graveyard. Otherwise, you'll draw too many copies of your sideboard card and that can affect your primary plan, cause heavy mulligans, and other issues. Amalia barely uses the graveyard, and I would not recommend bringing Leyline of the Void in. I have a full guide with explanations on my Patreon if you want further information. patreon.com/tandy