Dismember

({B/P} can be paid with either {B} or 2 life.)
Target creature gets -5/-5 until end of turn.

Swamp

At the beginning of your upkeep, reveal the top card of your library and put that card into your hand. You lose life equal to its mana value.

Death's Shadow gets -X/-X, where X is your life total.

Target player discards two cards at random.

Target player draws two cards and loses 2 life.

As Agadeem, the Undercrypt enters, you may pay 3 life. If you don't, it enters tapped.
{T}: Add {B}.

Return from your graveyard to the battlefield any number of target creature cards that each have a different mana value X or less.

Imprint — When Chrome Mox enters, you may exile a nonartifact, nonland card from your hand.
{T}: Add one mana of any of the exiled card's colors.

At the beginning of your upkeep, discard a card.

If you control a Swamp, you may pay 4 life rather than pay this spell's mana cost.
Destroy target nonblack creature. It can't be regenerated.

Target player reveals their hand. You choose a nonland card from it. That player discards that card. You lose 2 life.