There's very little that merchants won't buy—and even less that wastelanders won't sell.

Fallout

Black Market

Whenever a creature dies, put a charge counter on Black Market.
At the beginning of your first main phase, add {B} for each charge counter on Black Market.

Whenever a creature dies, put a charge counter on Black Market.
At the beginning of your precombat main phase, add {B} for each charge counter on Black Market.

Secret Lair Drop

Commander Legends: Battle for Baldur's Gate

Jumpstart

The List

Commander 2017

Whenever a creature dies, put a charge counter on Black Market.
At the beginning of your precombat main phase, add {B} to your mana pool for each charge counter on Black Market.

Commander 2015

Mercadian Masques

Whenever a creature is put into a graveyard from play, put a charge counter on Black Market.
At the beginning of your precombat main phase, add o
B to your mana pool for each charge counter on Black Market.