Not only do these pieces prevent life gain, but they essentially put a time limit on the game with their constant pressure
Agent Bishop, Man in Black Argivian Blacksmith Ballad of the Black Flag Bane Alley Blackguard Bite of the Black Rose Black Bolt, Inhuman King Black Carriage Black Cat Black Cat, Cunning Thief Black Chocobo Black Dragon Black Dragon Gate Black Hole Black Knight Black Lotus Black Mage's Rod Black Mana Battery Black Market Black Market Connections Black Market Tycoon Black Oak of Odunos Black Panther, Claws of Bast Black Panther, Hope Enduring Black Panther, Most Dangerous Black Panther, Vanguard Black Panther, Wakandan King Black Poplar Shaman Black Scarab Black Sun's Twilight Black Sun's Zenith Black Tom Cassidy Black Vise Black Waltz No
Its natural home is in EDH, where you arent as punished for the tapped land or life payment aspect of the MDFC, and there are ample targets in that format
Repeatable self-mill that makes blockers is always nice
You are at 3 life
The two types of land complement each other incredibly well