Of course, that doesn't stop you from trying to add cards from sets of your own design for instance
Magic: The Gathering as they are the primary mana source for any deck, but that sometimes leads to the physical cards being practically worthless when a new set launches
While the cost of dual lands make it hard to do on a budget, both blue-white and blue-black mill could go a long way to solving the deck's aggro issue by adding sweepers, hard removal, and / or lifegain to the sideboard
Thats with their popularity level, and the price of their packs
On top of all that, it has the extremely relevant ability of draining an opponent for every two life every time a creature dies
This means she can be a partner with any of the 18 doctors, or Rory Williams