Mind Ravel

Target player discards a card.
Draw a card at the beginning of the next turn's upkeep.

Hymn to Tourach

Target player discards two cards at random.

Thopter Foundry

{1}, Sacrifice a nontoken artifact: Create a 1/1 blue Thopter artifact creature token with flying. You gain 1 life.

Mind Twist

Target player discards X cards at random.

Blasting Station

{T}, Sacrifice a creature: This artifact deals 1 damage to any target.
Whenever a creature enters, you may untap this artifact.

Cloak of Confusion

Enchant creature you control
Whenever enchanted creature attacks and isn't blocked, you may have it assign no combat damage this turn. If you do, defending player discards a card at random.

Horrifying Revelation

Target player discards a card, then mills a card.

Animate Dead

Enchant creature card in a graveyard
When this Aura enters, if it's on the battlefield, it loses "enchant creature card in a graveyard" and gains "enchant creature put onto the battlefield with this Aura." Return enchanted creature card to the battlefield under your control and attach this Aura to it. When this Aura leaves the battlefield, that creature's controller sacrifices it.
Enchanted creature gets -1/-0.

The Rack

As this artifact enters, choose an opponent.
At the beginning of the chosen player's upkeep, this artifact deals X damage to that player, where X is 3 minus the number of cards in their hand.

Mind Rot

Dark Ritual

Island

Abyssal Specter

Flying
Whenever this creature deals damage to a player, that player discards a card.

Hypnotic Specter

Flying
Whenever this creature deals damage to an opponent, that player discards a card at random.

Sword of the Meek

Equipped creature gets +1/+2.
Equip {2}
Whenever a 1/1 creature you control enters, you may return this card from your graveyard to the battlefield, then attach it to that creature.

Mask of Riddles

Equipped creature has fear. (It can't be blocked except by artifact creatures and/or black creatures.)
Whenever equipped creature deals combat damage to a player, you may draw a card.
Equip {2}

Spell Blast

Counter target spell with mana value X. (For example, if that spell's mana cost is {3}{U}{U}, X is 5.)

Counterspell

Rag Man

{B}{B}{B}, {T}: Target opponent reveals their hand and discards a creature card at random. Activate only during your turn.

Swamp

Megrim

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

Dimir Guildgate

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

Mind Warp

Look at target player's hand and choose X cards from it. That player discards those cards.

Will-o'-the-Wisp

Flying (This creature can't be blocked except by creatures with flying or reach.)
{B}: Regenerate this creature. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

Geth's Grimoire

Whenever an opponent discards a card, you may draw a card.

Zuran Enchanter

{2}{B}, {T}: Target player discards a card. Activate only during your turn.

Mindstab Thrull

Whenever this creature attacks and isn't blocked, you may sacrifice it. If you do, defending player discards three cards.

Locust Miser

Each opponent's maximum hand size is reduced by two.

Recall

Discard X cards, then return a card from your graveyard to your hand for each card discarded this way. Exile Recall.