Swamp

Guiltfeeder

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)
Whenever Guiltfeeder attacks and isn't blocked, defending player loses 1 life for each card in their graveyard.

Ill-Gotten Gains

Exile Ill-Gotten Gains. Each player discards their hand, then returns up to three cards from their graveyard to their hand.

Mind Twist

Target player discards X cards at random.

Ensnaring Bridge

Creatures with power greater than the number of cards in your hand can't attack.

Tainted Isle

{T}: Add {C}.
{T}: Add {U} or {B}. Activate only if you control a Swamp.

Megrim

Whenever an opponent discards a card, Megrim deals 2 damage to that player.

Demonic Tutor

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

Hymn to Tourach

Target player discards two cards at random.

Rackling

At the beginning of each opponent's upkeep, Rackling deals X damage to that player, where X is 3 minus the number of cards in their hand.

Island

Duress

Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.

Brainstorm

Draw three cards, then put two cards from your hand on top of your library in any order.

Darkwater Catacombs

Noetic Scales

At the beginning of each player's upkeep, return to its owner's hand each creature that player controls with power greater than the number of cards in their hand.

Undermine

Counter target spell. Its controller loses 3 life.

Coercion

Target opponent reveals their hand. You choose a card from it. That player discards that card.