I just went on an 8 game win streak after tossing this together and flew to gold so I figure I’ll share since it’s a fun deck.
Nocturnes with Abyssal Crawlers means you have a steady supply of wraithlings to act as walls which is primarily what you’re using all wraithlings for. Nocturnes with Lilith’s bloodborn spell means you can paint the board as you move along. Use your other minions as lightning rods to help protect your Nocturnes. Lilith really never has to engage outside of blocking. Shadow Nova gives you a block of wraithlings that are useful for separating yourself. Obliterate is your primary win card and it’s actually easy to get enough creep on the board well ahead of it being playable.