You can play City of BrassCity of Brass, and similar lands, to produce the color you need
It can protect valuable cards from black discard, and can combine with library shuffling effects to improve your draw (such as Thawing Glaciers, Flooded Strand, or Ramosian Sergeant)
While there are a ton of different treatments for the Eldrazi Titans in Modern Horizons 3, the concept artwork used for the serialized variants isnt uniquely available in serialized variants
When another Black dork ETBs, you drain a life from each foe, so she's a win-con tied to a legendary dork for Command Zone purposes
Until end of turn, you may play as though that card were in your hand
Triumph of the Hordes and Overwhelming Stampede both make pretty solid finishers if you need to push through damage