I draw cards, I gain life. You draw cards, you lose it. Protect the Commander as much as possible, everything else becomes passive.

Bonus! I pulled Sheoldred from a pack. Actually, twice, but I only have one copy now.

Mono Black

Deathtouch

Whenever you draw a card, you gain 2 life.

Whenever an opponent draws a card, they lose 2 life.

Commander
Sheoldred, the Apocalypse

Artifacts
Lightning Greaves
Poet's Quill
Reaper's Talisman
Zephyr Boots

Creatures
Archetype of Finality
Ayara, First of Locthwain
Black Knight
Blade of the Oni
Blight-Breath Catoblepas
Butcher of Malakir
Defiant Bloodlord
Diamond Mare
Doomed Dissenter
Elder Brain
Epicure of Blood
Fate Unraveler
Fretwork Colony
Gray Merchant of Asphodel
Knight of Dusk's Shadow
Korlash, Heir to Blackblade
Locthwain Paladin
Marauding Blight-Priest
Marshmist Titan
Nightmare
Nirkana Revenant
Nothic
Noxious Gearhulk
Paragon of Open Graves
Royal Assassin
Scion of Darkness
Shadow Alley Denizen
Soul of Innistrad
Tymaret, Chosen from Death
Vengeful Warchief
Viconia, Drow Apostate
Vito, Thorn of the Dusk Rose

Enchantments
Agent of the Iron Throne
Bloodchief Ascension
Exquisite Blood
Hedonist's Trove
Sanguine Bond
Underworld Dreams

Instants
Blood Pact
Cast Down
Dark Dabbling
Dark Ritual
Defile
Poison the Cup
Tribute to Hunger

Sorcery
Blood Divination
Demogorgon's Clutches
Epic Downfall
Eviscerate
Ghouls' Night Out
Go Blank
Impale
Invoke Despair
Mind Drain
Mind Rot
Painful Lesson
Peer into the Abyss
Profane Tutor
Read the Bones
Recover

Lands
Bojuka Bog
Castle Locthwain
Swamp x 33