Marauding Blight-Priest , Epicure of Blood , and Defiant Bloodlord are all under 40 cents and each copy the Sanguine Bond drain effect
Thankfully, blacks become a lot more blas about spending life to gain advantage
A lot of the fun involves experimenting with cards I don't typically lean on in my Commander builds because they fit a particular story moment, item, or character interaction as opposed to being "best in class" for a deck archetype
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For artifacts, SkullclampSkullclamp is an ideal inclusion, as are mana generating "rocks" that a lot of EDH decks play anyway, like Sol RingSol Ring, Fellwar StoneFellwar Stone, and Arcane SignetArcane Signet
It reminds me of Brutal Expulsion, which is a card that Ive been very happy with in my various U/R and Grixis Eldrazi decks