black discard cards mtg Mono-Black Discard Rack (mono Black) Deck

That's a huge part of most Mono-Black decks, and this one's no different

The fact that you can double the damage as well as fuel possible land drop synergies isn't likely to make this one playable

A little easier to disrupt than some of the other life gain but well worth that risk if you have sufficient creature support

Each of those, like the Darkness Crystal, will reduce the mana required to cast a spell in its appropriate color by 1, and will cost four mana two of the color of choice, but the rest is unique to each Crystal

All are fine picks for a vampire deck, but Ive actually lost to the Drana, Liberator of Malakir and Drana, Kalastria Bloodchief in Commander games, so thats how you decide how to prioritize these