Consuming Corruption

Consuming Corruption deals X damage to target creature or planeswalker and you gain X life, where X is the number of Swamps you control.

Rottenheart Ghoul

When Rottenheart Ghoul dies, target player discards a card.

Accursed Marauder

When Accursed Marauder enters, each player sacrifices a nontoken creature.

Dreadmobile

Menace
{1}, Sacrifice another artifact or creature: Put a +1/+1 counter on Dreadmobile.
Crew 1 (Tap any number of creatures you control with total power 1 or more: This Vehicle becomes an artifact creature until end of turn.)

Liliana's Elite

Liliana's Elite gets +1/+1 for each creature card in your graveyard.

Buried Alive

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

Plague Wight

Whenever Plague Wight becomes blocked, each creature blocking it gets -1/-1 until end of turn.