Crosis, the Purger

Flying
Whenever Crosis, the Purger deals combat damage to a player, you may pay {2}{B}. If you do, choose a color, then that player reveals their hand and discards all cards of that color.

Pestilence

At the beginning of the end step, if no creatures are on the battlefield, sacrifice Pestilence.
{B}: Pestilence deals 1 damage to each creature and each player.

Sol Ring

Avatar of Will

If an opponent has no cards in hand, this spell costs {6} less to cast.
Flying

Gwendlyn Di Corci

{T}: Target player discards a card at random. Activate only during your turn.

Seer's Vision

Your opponents play with their hands revealed.
Sacrifice Seer's Vision: Look at target player's hand and choose a card from it. That player discards that card. Activate only as a sorcery.

Frantic Search

Draw two cards, then discard two cards. Untap up to three lands.

Empress Galina

{U}{U}, {T}: Gain control of target legendary permanent. (This effect lasts indefinitely.)

Glasses of Urza

Fireball

This spell costs {1} more to cast for each target beyond the first.
Fireball deals X damage divided evenly, rounded down, among any number of targets.

Terminate

Destroy target creature. It can't be regenerated.

Searing Wind

Searing Wind deals 10 damage to any target.

Reconstruction

Return target artifact card from your graveyard to your hand.

Raise Dead

Return target creature card from your graveyard to your hand.

Rhystic Study

Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.

Exclude

Counter target creature spell.
Draw a card.

Blazing Specter

Flying, haste
Whenever Blazing Specter deals combat damage to a player, that player discards a card.

Plague Wind

Destroy all creatures you don't control. They can't be regenerated.

Fact or Fiction

Reveal the top five cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other into your graveyard.

Nicol Bolas

Flying
At the beginning of your upkeep, sacrifice Nicol Bolas unless you pay {U}{B}{R}.
Whenever Nicol Bolas deals damage to an opponent, that player discards their hand.

Nightscape Familiar

Blue spells and red spells you cast cost {1} less to cast.
{1}{B}: Regenerate Nightscape Familiar.

Counterspell

Demonic Tutor

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

Phyrexian Arena

At the beginning of your upkeep, you draw a card and you lose 1 life.

Recoil

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

Bloodstone Cameo

Blue Elemental Blast

Choose one —
• Counter target red spell.
• Destroy target red permanent.

Windfall

Each player discards their hand, then draws cards equal to the greatest number of cards a player discarded this way.

Disrupt

Counter target instant or sorcery spell unless its controller pays {1}.
Draw a card.

Rhystic Tutor

Unless any player pays {2}, search your library for a card, put that card into your hand, then shuffle.

Nightscape Master

{U}{U}, {T}: Return target creature to its owner's hand.
{R}{R}, {T}: Nightscape Master deals 2 damage to target creature.

Spell Blast

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