Then sacrificing dorks for cards became a thing and now Black usually either sacrifices dorks or pays life for card draw
5 Island 7 Swamp 8 Plains And They Shall Know No Fear Arcane Sanctum Arcane Signet Arco-Flagellant Ash Barrens Assault Intercessor Bastion Protector Belisarius Cawl Birth of the Imperium Callidus Assassin Celestine, the Living Saint Choked Estuary Collective Effort Command Tower Commander's Sphere Commissar Severina Raine Company Commander Cybernetica Datasmith Darkwater Catacombs Defenders of Humanity Deny the Witch Deploy to the Front Dismal Backwater Entrapment Maneuver Epistolary Librarian Everflowing Chalice Evolving Wilds Exotic Orchard Exterminatus Fell the Mighty For the Emperor
Sure you won't always hit cards of mana value 6 or better, but it's a pretty good mana sink
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You can alternate between removal and card advantage while beating down with your 3/4 planeswalker, and if its not enough, you can anthem on the +1 ability for ninjas
Creature - Spider Color tag templates(None) Nyx Weaver Reach At the beginning of your upkeep, mill two cards