Best Black Unearth Cards Most unearth cards are black, which makes sense
The other options are ones that are cheaper but lose you a card (Such as Vampiric Tutor), or cost more mana (Diabolic Tutor) or only tutor for a sub-set of cards (Open the Armory) or otherwise have serious restrictions on them
It does have its downsides, it only works at sorcery speed and costs two mana, but it's a quick way to go search your library for a Sol Ring or Sensei's Divining Top, so it ain't half bad
The Mono White deck seemed like a solid 3-2 deck, but it had major inconsistencies and a big target on its head right now
Interaction Reconnaissance does great work in any deck that gets attack triggers, letting you run your attackers into certain death to ramp up your coolness to 100% or more, and then untapping them and removing them from combat before they could die
The other thing is that you want to control how much paint youre picking up for each area