Festus, the Leechlord

Whenever Festus, the Leechlord or another
black creature enters the battlefield under your control, each opponent loses 1 life and you
gain 1 life.
{t}, Sacrifice another black creature: Draw a card.

"A host. That is what every plague desires. A home
where it can thrive, a strong specimen to stay alive
long enough for the pox to grow, to mature."