Flying At the beginning of each opponent's end step, that player chooses up to two creatures they control, then sacrifices the rest.

Destroy target nonblack creature.

Whenever a creature you control dies, each other player sacrifices a creature of their choice.

When this creature enters, each player sacrifices a creature or planeswalker of their choice. Each player who can't discards a card.

{2}, {T}: Add {B} for each Swamp you control.

This land enters tapped. {T}: Add {B}. {2}, {T}: Add {B} for each black creature card in your graveyard.

Search your library for up to three creature cards, put them into your graveyard, then shuffle.

Search your library for a card, put that card into your graveyard, then shuffle.

Search your library for two cards. Put one into your hand and the other into your graveyard. Then shuffle.

Black creature spells you cast cost {1} less to cast. Whenever you cast a creature spell, each opponent loses 1 life and you gain 1 life.

As this artifact enters, choose a color. Creatures you control of the chosen color get +1/+1. Whenever a land's ability causes you to add one or more mana of the chosen color, add one additional mana of that color.

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.) At the beginning of your upkeep, return target creature card from your graveyard to the battlefield. At the beginning of each opponent's upkeep, that player sacrifices a creature of their choice.