Swamp

Command of Unsummoning

Cast this spell only during the declare attackers step and only if you've been attacked this step.
Return one or two target attacking creatures to their owner's hand.

Dimir Aqueduct

This land enters tapped.
When this land enters, return a land you control to its owner's hand.
{T}: Add {U}{B}.

Hard Evidence

Create a 0/3 blue Crab creature token.
Investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.")

Island

Aetherize

Return all attacking creatures to their owner's hand.

Lobotomy

Target player reveals their hand, then you choose a card other than a basic land card from it. Search that player's graveyard, hand, and library for all cards with the same name as the chosen card and exile them. Then that player shuffles.

Warped Devotion

Whenever a permanent is returned to a player's hand, that player discards a card.

Terror

Destroy target nonartifact, nonblack creature. It can't be regenerated.

Unsummon

Return target creature to its owner's hand.

True-Name Nemesis

As this creature enters, choose a player.
This creature has protection from the chosen player.

Duress

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

Clone

You may have this creature enter as a copy of any creature on the battlefield.

Darkwater Catacombs

Underground Sea

Shadowmage Infiltrator

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)
Whenever this creature deals combat damage to a player, you may draw a card.

Counterspell

Barrin's Spite

Choose two target creatures controlled by the same player. Their controller chooses and sacrifices one of them. Return the other to its owner's hand.

Talrand, Sky Summoner

Whenever you cast an instant or sorcery spell, create a 2/2 blue Drake creature token with flying.

Recoil

Return target permanent to its owner's hand. Then that player discards a card.

Fade Away

For each creature, its controller sacrifices a permanent of their choice unless they pay {1}.

Opposition

Tap an untapped creature you control: Tap target artifact, creature, or land.

Temple of Deceit

This land enters tapped.
When this land enters, scry 1. (Look at the top card of your library. You may put that card on the bottom.)
{T}: Add {U} or {B}.

Diabolic Vision

Look at the top five cards of your library. Put one of them into your hand and the rest on top of your library in any order.

Wash Out

Return all permanents of the color of your choice to their owners' hands.

Abjure

As an additional cost to cast this spell, sacrifice a blue permanent.
Counter target spell.