Gurmag Angler

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.)

Dark Ritual

Sign in Blood

Target player draws two cards and loses 2 life.

Rancid Earth

Destroy target land.
Threshold — If seven or more cards are in your graveyard, instead destroy that land and Rancid Earth deals 1 damage to each creature and each player.

Bojuka Bog

Bojuka Bog enters tapped.
When Bojuka Bog enters, exile target player's graveyard.
{T}: Add {B}.

Choking Sands

Destroy target non-Swamp land. If that land was nonbasic, Choking Sands deals 2 damage to the land's controller.

Night's Whisper

Peat Bog

Peat Bog enters tapped with two depletion counters on it.
{T}, Remove a depletion counter from Peat Bog: Add {B}{B}. If there are no depletion counters on Peat Bog, sacrifice it.

Befoul

Destroy target land or nonblack creature. It can't be regenerated.

Drown in Sorrow

All creatures get -2/-2 until end of turn. Scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Icequake

Destroy target land. If that land was a snow land, Icequake deals 1 damage to that land's controller.

Chittering Rats

When Chittering Rats enters, target opponent puts a card from their hand on top of their library.