Witherbloom Pestilence (BG): Sacrifice creatures for value, gain life, and build unstoppable momentum with synergistic counters and effects
Then, all your creatures get +1/+1 counters equal to the total number of security votes, giving Emissary Green a boost in power as well as everything else you control
It has the following abilities: Trample When Avenging Hunter enters the battlefield, you take the initiative
Buy singles for card acquisition instead of opening ETBs at current prices
Shows the Market Price trend over time
Add in discard outlets like big creatures with Cycling (which you can grab back), Golbez, Crystal Collector's own Surveil ability, and old classics like Bottomless Pit, and we've got a nasty little engine here