You can have rogues that benefit from mill or you can use cards that care about the damage dealt and enjoy the extra cards
1 Foil-etched rare or mythic rare legendary creature or foil borderless planeswalker
Every card has what's called a color identity. Since your commander is the one leading your build, all of the cards in your deck have to be within your commanders color identity , or colorless cards
They even surpass the original dual lands in terms of how important they are, making them a key part of just about every format they're legal in
These decks are complex, but exciting, and it feels like so much love and care went into crafting them for Magic and Doctor Who fans alike
With where the format is currently, I value instant speed interaction highly, so my top choices for this slot are Natures Claim and the phenomenal newcomer, Cankerbloom