Plaguecrafter

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

Mountain

Virus Beetle

When Virus Beetle enters, each opponent discards a card.

Fell Specter

Flying
When Fell Specter enters, target opponent discards a card.
Whenever an opponent discards a card, that player loses 2 life.

Burglar Rat

When this creature enters, each opponent discards a card.

Smoldering Marsh

({T}: Add {B} or {R}.)
Smoldering Marsh enters tapped unless you control two or more basic lands.

Skull Rend

Skull Rend deals 2 damage to each opponent. Those players each discard two cards at random.

Raiders' Wake

Whenever an opponent discards a card, that player loses 2 life.
Raid — At the beginning of your end step, if you attacked this turn, target opponent discards a card.

Vicious Rumors

Vicious Rumors deals 1 damage to each opponent. Each opponent discards a card, then mills a card. You gain 1 life.

Bedevil

Destroy target artifact, creature, or planeswalker.

Elderfang Disciple

When Elderfang Disciple enters, each opponent discards a card.

Swamp

Sign in Blood

Target player draws two cards and loses 2 life.