Divest

Target player reveals their hand. You choose an artifact or creature card from it. That player discards that card.

Mesmeric Fiend

When this creature enters, target opponent reveals their hand and you choose a nonland card from it. Exile that card.
When this creature leaves the battlefield, return the exiled card to its owner's hand.

Snuff Out

If you control a Swamp, you may pay 4 life rather than pay this spell's mana cost.
Destroy target nonblack creature. It can't be regenerated.

Dismal Backwater

This land enters tapped.
When this land enters, you gain 1 life.
{T}: Add {U} or {B}.

Duress

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

Secret Door

Defender
{4}{U}: Venture into the dungeon. Activate only as a sorcery. (Enter the first room or advance to the next room.)

Screeching Sliver

All Slivers have "{T}: Target player mills a card."

Hydroblast

Choose one —
• Counter target spell if it's red.
• Destroy target permanent if it's red.

Suffocating Fumes

Creatures your opponents control get -1/-1 until end of turn.
Cycling {2} ({2}, Discard this card: Draw a card.)

Rootwater Mystic

{1}{U}: Look at the top card of target player's library.

Lurking Informant

({U/B} can be paid with either {U} or {B}.)
{2}, {T}: Look at the top card of target player's library. You may put that card into that player's graveyard.

Counterspell

Swamp

Relic of Progenitus

{T}: Target player exiles a card from their graveyard.
{1}, Exile this artifact: Exile all graveyards. Draw a card.

Cathartic Adept

Spell Pierce

Counter target noncreature spell unless its controller pays {2}.

Contaminated Aquifer

({T}: Add {U} or {B}.)
This land enters tapped.

Thought Scour

Target player mills two cards.
Draw a card.

Island

Brainstorm

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