First, it leaves access room in the corners, which end up bending while being shuffled
The Warp option lets you stash it early so it re-enters when your hand is ready to spam baubles and rocks
More importantly, it hates on graveyard strategies while in play, and some may not even have maindeck removal, especially if they go all in on the combo plan
Onto the new cards, weve got Broodlord, a +1/+1 counter distributor or giant creature
It demands careful life management, but if you build around it properly, Necropotence does what black does best: convert risk into control
The deck is built to maximise the number of power-2-or-less creatures you can maintain, creating a damage clock that ticks up every single turn