Extort

Extort (Visual)

Tons of "opponent(s) lose life, you gain life" effects.
This deck could add Red, as there are some "take damage gain life" effects in Red/White also, but it's probably not enough to be worth it.

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Click here for my EDH Commander decks

General (1):
Kambal, Consul of Allocation

Creatures (25):
Cliffhaven Vampire Kingpin's Pet Liesa, Shroud of Dusk Tithe Drinker Treasury Thrull Vizkopa Confessor Vizkopa Guildmage Archon of Cruelty Baleful Force Basilica Screecher Bloodgift Demon Defiant Bloodlord Epicure of Blood Gray Merchant of Asphodel Kokusho, the Evening Star Marauding Blight-Priest Pontiff of Blight Syndicate Enforcer Thrull Parasite Twilight Prophet Vito, Thorn of the Dusk Rose Archangel of Thune Basilica Guards Knight of Obligation Syndic of Tithes

Spells (24):
Well of Lost Dreams Anguished Unmaking Death Grasp Debt to the Deathless Kaya, Ghost Assassin Sorin, Grim Nemesis Bloodchief Ascension Chainer's Torment Consume Spirit Dread Presence Exquisite Blood Exsanguinate Grave Endeavor Necropotence Ob Nixilis Reignited Palace Siege Phyrexian Arena Sanguine Bond Sorin's Vengeance Trespasser's Curse Blind Obedience Dawn of Hope Cradle of Vitality Sunbond

Mana Acceleration (14):
Astral Cornucopia Burnished Hart Caged Sun Commander's Sphere Gauntlet of Power Gilded Lotus Orzhov Cluestone Orzhov Keyrune Orzhov Locket Orzhov Signet Unstable Obelisk Crypt Ghast Magus of the Coffers Nirkana Revenant

Lands (36):
Scrubland Godless Shrine Fetid Heath Isolated Chapel Orzhov Basilica Agadeem's Awakening Blackbloom Rogue Command Tower Emeria's Call Hagra Mauling Hostile Hostel Kabira Takedown Makindi Stampede Malakir Rebirth Myriad Landscape Ondu Inversion Sejiri Shelter Skyclave Cleric War Room Zof Consumption Swamp Swamp Swamp Swamp Swamp Swamp Swamp Swamp Swamp Swamp Swamp Swamp Swamp Swamp Swamp Sol Ring