Whenever you cycle or discard another card, put a -1/-1 counter on each creature your opponents control.
Cycling {2} ({2}, Discard this card: Draw a card.)
5 /
4
{2}{U}
Curse of Verbosity
Enchantment - Aura Curse
Enchant player
Whenever enchanted player is attacked, you draw a card. Each opponent attacking that player does the same.
{2}{B}
Dark Deal
Sorcery
Each player discards all the cards in their hand, then draws that many cards minus one.
{1}{U}{U}
Dictate of Kruphix
Enchantment
Flash
At the beginning of each player's draw step, that player draws an additional card.
{5}{R}{R}
Dragon Mage
Creature - Dragon Wizard
Flying
Whenever Dragon Mage deals combat damage to a player, each player discards their hand, then draws seven cards.
5 /
5
{3}{B}
Fate Unraveler
Enchantment Creature - Hag
Whenever an opponent draws a card, Fate Unraveler deals 1 damage to that player.
3 /
4
{3}{B}
Fell Specter
Creature - Specter
Flying
When Fell Specter enters the battlefield, target opponent discards a card.
Whenever an opponent discards a card, that player loses 2 life.
1 /
3
{1}{U}{R}
Fevered Visions
Enchantment
At the beginning of each player's end step, that player draws a card. If the player is your opponent and has four or more cards in hand, Fevered Visions deals 2 damage to that player.
{4}
Geth's Grimoire
Artifact
Whenever an opponent discards a card, you may draw a card.
{2}
Howling Mine
Artifact
At the beginning of each player's draw step, if Howling Mine is untapped, that player draws an additional card.
{3}{R}{R}
Incendiary Command
Sorcery
Choose two --
• Incendiary Command deals 4 damage to target player or planeswalker.
• Incendiary Command deals 2 damage to each creature.
• Destroy target nonbasic land.
• Each player discards all the cards in their hand, then draws that many cards.
{1}{U}{U}
Jace's Archivist
Creature - Vedalken Wizard
{U}, {T}: Each player discards their hand, then draws cards equal to the greatest number of cards a player discarded this way.
2 /
2
{1}{U}
Jace's Erasure
Enchantment
Whenever you draw a card, you may have target player mill a card.
{U}{U}
Kami of the Crescent Moon
Legendary Creature - Spirit
At the beginning of each player's draw step, that player draws an additional card.
1 /
3
{B}
Kederekt Parasite
Creature - Horror
Whenever an opponent draws a card, if you control a red permanent, you may have Kederekt Parasite deal 1 damage to that player.
1 /
1
{1}{U}{B}{R}
Kess, Dissident Mage
Legendary Creature - Human Wizard
Flying
Once during each of your turns, you may cast an instant or sorcery spell from your graveyard. If a spell cast this way would be put into your graveyard, exile it instead.
3 /
4
{1}{B}
Liliana's Caress
Enchantment
Whenever an opponent discards a card, that player loses 2 life.
{2}{R}
Magus of the Wheel
Creature - Human Wizard
{1}{R}, {T}, Sacrifice Magus of the Wheel: Each player discards their hand, then draws seven cards.
3 /
3
{1}{B}{B}
Master of the Feast
Enchantment Creature - Demon
Flying
At the beginning of your upkeep, each opponent draws a card.
5 /
5
{2}{B}
Megrim
Enchantment
Whenever an opponent discards a card, Megrim deals 2 damage to that player.
{5}
Mind's Eye
Artifact
Whenever an opponent draws a card, you may pay {1}. If you do, draw a card.
{1}{R}{R}
Molten Psyche
Sorcery
Each player shuffles the cards from their hand into their library, then draws that many cards.
Metalcraft -- If you control three or more artifacts, Molten Psyche deals damage to each opponent equal to the number of cards that player has drawn this turn.
{2}{U}{B}{R}
Nekusar, the Mindrazer
Legendary Creature - Zombie Wizard
At the beginning of each player's draw step, that player draws an additional card.
Whenever an opponent draws a card, Nekusar, the Mindrazer deals 1 damage to that player.
2 /
4
{1}{B}
Nightscape Familiar
Creature - Zombie
Blue spells and red spells you cast cost {1} less to cast.
{1}{B}: Regenerate Nightscape Familiar.
1 /
1
{2}{U}{U}{R}{R}
Niv-Mizzet, Dracogenius
Legendary Creature - Dragon Wizard
Flying
Whenever Niv-Mizzet, Dracogenius deals damage to a player, you may draw a card.
{U}{R}: Niv-Mizzet, Dracogenius deals 1 damage to any target.
5 /
5
{U}{U}{U}{R}{R}{R}
Niv-Mizzet, Parun
Legendary Creature - Dragon Wizard
This spell can't be countered.
Flying
Whenever you draw a card, Niv-Mizzet, Parun deals 1 damage to any target.
Whenever a player casts an instant or sorcery spell, you draw a card.
5 /
5
{2}{U}{U}{R}{R}
Niv-Mizzet, the Firemind
Legendary Creature - Dragon Wizard
Flying
Whenever you draw a card, Niv-Mizzet, the Firemind deals 1 damage to any target.
{T}: Draw a card.
4 /
4
{3}{B}{B}
Ob Nixilis, the Hate-Twisted
Legendary Planeswalker - Nixilis
Whenever an opponent draws a card, Ob Nixilis, the Hate-Twisted deals 1 damage to that player.
-2: Destroy target creature. Its controller draws two cards.
L:
5
{4}{B}{B}{B}
Peer into the Abyss
Sorcery
Target player draws cards equal to half the number of cards in their library and loses half their life. Round up each time.
{X}{U}
Prosperity
Sorcery
Each player draws X cards.
{2}{U}
Psychic Corrosion
Enchantment
Whenever you draw a card, each opponent mills two cards.
{2}{U}{U}
Psychic Possession
Enchantment - Aura
Enchant opponent
Skip your draw step.
Whenever enchanted opponent draws a card, you may draw a card.
{5}
Psychosis Crawler
Artifact Creature - Phyrexian Horror
Psychosis Crawler's power and toughness are each equal to the number of cards in your hand.
Whenever you draw a card, each opponent loses 1 life.
* /
*
{3}{R}{R}
Reforge the Soul
Sorcery
Each player discards their hand, then draws seven cards.
Miracle {1}{R} (You may cast this card for its miracle cost when you draw it if it's the first card you drew this turn.)
{2}{U}
Sphinx's Tutelage
Enchantment
Whenever you draw a card, target opponent mills two cards. If two nonland cards that share a color were milled this way, repeat this process.
{5}{U}: Draw a card, then discard a card.
{2}{B/R}{B/R}
Spiteful Visions
Enchantment
At the beginning of each player's draw step, that player draws an additional card.
Whenever a player draws a card, Spiteful Visions deals 1 damage to that player.
{B}{R}
Stormfist Crusader
Creature - Human Knight
Menace
At the beginning of your upkeep, each player draws a card and loses 1 life.
2 /
2
{4}
Teferi's Puzzle Box
Artifact
At the beginning of each player's draw step, that player puts the cards in their hand on the bottom of their library in any order, then draws that many cards.
{3}
Temple Bell
Artifact
{T}: Each player draws a card.
{B}{B}{B}
Underworld Dreams
Enchantment
Whenever an opponent draws a card, Underworld Dreams deals 1 damage to that player.
{1}{B}
Waste Not
Enchantment
Whenever an opponent discards a creature card, create a 2/2 black Zombie creature token.
Whenever an opponent discards a land card, add {B}{B}.
Whenever an opponent discards a noncreature, nonland card, draw a card.
{3}{U}
Wheel and Deal
Instant
Any number of target opponents each discard their hands, then draw seven cards.
Draw a card.
{2}{U}{B}
Whispering Madness
Sorcery
Each player discards their hand, then draws cards equal to the greatest number of cards a player discarded this way.
Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)
{2}{U}
Windfall
Sorcery
Each player discards their hand, then draws cards equal to the greatest number of cards a player discarded this way.