As an additional cost to cast this spell, discard X cards.
Look at target opponent's hand and choose X cards from it. That player discards those cards.
{2}{U}{U}
Bident of Thassa
Legendary Enchantment Artifact
Whenever a creature you control deals combat damage to a player, you may draw a card.
{1}{U}, {T}: Creatures your opponents control attack this turn if able.
{U}
Cloak of Feathers
Sorcery
Target creature gains flying until end of turn.
Draw a card.
{3}{U}
Collective Restraint
Enchantment
Domain -- Creatures can't attack you unless their controller pays {X} for each creature they control that's attacking you, where X is the number of basic land types among lands you control.
{U}
Curiosity
Enchantment - Aura
Enchant creature
Whenever enchanted creature deals damage to an opponent, you may draw a card.
{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.
--
Darksteel Citadel
Artifact Land
Indestructible
{T}: Add {C}.
{1}{U}{U}
Dictate of Kruphix
Enchantment
Flash
At the beginning of each player's draw step, that player draws an additional card.
{2}
Endless Atlas
Artifact
{2}, {T}: Draw a card. Activate only if you control three or more lands with the same name.
{2}{U}
Ever-Watching Threshold
Enchantment
Whenever an opponent attacks, if they attacked you and/or a planeswalker you control, draw a card.
{0}
Everflowing Chalice
Artifact
Multikicker {2} (You may pay an additional {2} any number of times as you cast this spell.)
Everflowing Chalice enters the battlefield with a charge counter on it for each time it was kicked.
{T}: Add {C} for each charge counter on Everflowing Chalice.
{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.
{1}{U}
Folio of Fancies
Artifact
Players have no maximum hand size.
{X}{X}, {T}: Each player draws X cards.
{2}{U}, {T}: Each opponent mills cards equal to the number of cards in their hand.
{4}
Font of Mythos
Artifact
At the beginning of each player's draw step, that player draws two additional cards.
{4}{U}{U}
Forced Fruition
Enchantment
Whenever an opponent casts a spell, that player draws seven cards.
{4}
Geth's Grimoire
Artifact
Whenever an opponent discards a card, you may draw a card.
{4}
Ghirapur Orrery
Artifact
Each player may play an additional land on each of their turns.
At the beginning of each player's upkeep, if that player has no cards in hand, that player draws three cards.
{U/P}
Gitaxian Probe
Sorcery
({U/P} can be paid with either {U} or 2 life.)
Look at target player's hand.
Draw a card.
{2}
Grim Monolith
Artifact
Grim Monolith doesn't untap during your untap step.
{T}: Add {C}{C}{C}.
{4}: Untap Grim Monolith.
{3}
Hazoret's Monument
Legendary Artifact
Red creature spells you cast cost {1} less to cast.
Whenever you cast a creature spell, you may discard a card. If you do, draw a card.
{3}{U}{U}
Heightened Awareness
Enchantment
As Heightened Awareness enters the battlefield, discard your hand.
At the beginning of your draw step, draw an additional 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.
{X}{R}
Illuminate
Sorcery
Kicker {2}{R} and/or {3}{U} (You may pay an additional {2}{R} and/or {3}{U} as you cast this spell.)
Illuminate deals X damage to target creature. If this spell was kicked with its {2}{R} kicker, it deals X damage to that creature's controller. If this spell was kicked with its {3}{U} kicker, you draw X cards.
{3}
Implement of Examination
Artifact
{U}, Sacrifice Implement of Examination: Draw a card.
When Implement of Examination is put into a graveyard from the battlefield, draw a card.
{3}
Izzet Cluestone
Artifact
{T}: Add {U} or {R}.
{U}{R}, {T}, Sacrifice Izzet Cluestone: Draw a card.
{3}
Izzet Keyrune
Artifact
{T}: Add {U} or {R}.
{U}{R}: Until end of turn, Izzet Keyrune becomes a 2/1 blue and red Elemental artifact creature.
Whenever Izzet Keyrune deals combat damage to a player, you may draw a card. If you do, discard a card.
{3}
Izzet Locket
Artifact
{T}: Add {U} or {R}.
{U/R}{U/R}{U/R}{U/R}, {T}, Sacrifice Izzet Locket: Draw two cards.
{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
{3}{U}{R}
Keranos, God of Storms
Legendary Enchantment Creature - God
Indestructible
As long as your devotion to blue and red is less than seven, Keranos isn't a creature.
Reveal the first card you draw on each of your turns. Whenever you reveal a land card this way, draw a card. Whenever you reveal a nonland card this way, Keranos deals 3 damage to any target.
6 /
5
{1}
Library of Leng
Artifact
You have no maximum hand size.
If an effect causes you to discard a card, discard it, but you may put it on top of your library instead of into your graveyard.
{1}{U}{R}
Ludevic, Necro-Alchemist
Legendary Creature - Human Wizard
At the beginning of each player's end step, that player may draw a card if a player other than you lost life this turn.
Partner (You can have two commanders if both have partner.)
1 /
4
{R}
Magmatic Insight
Sorcery
As an additional cost to cast this spell, discard a land card.
Draw two cards.
{1}{R/G}
Manamorphose
Instant
Add two mana in any combination of colors.
Draw a card.
{1}{U}
Merfolk Looter
Creature - Merfolk Rogue
{T}: Draw a card, then discard a card.
1 /
1
{0}
Mox Ruby
Artifact
{T}: Add {R}.
{0}
Mox Sapphire
Artifact
{T}: Add {U}.
{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
{2}{U}
Ophidian Eye
Enchantment - Aura
Flash (You may cast this spell any time you could cast an instant.)
Enchant creature
Whenever enchanted creature deals damage to an opponent, you may draw a card.
{R}
Overmaster
Sorcery
The next instant or sorcery spell you cast this turn can't be countered.
Draw a card.
{3}
Palladium Myr
Artifact Creature - Myr
{T}: Add {C}{C}.
2 /
2
{0}
Paradise Mantle
Artifact - Equipment
Equipped creature has "{T}: Add one mana of any color."
Equip {1}
{3}{R}
Pirate's Pillage
Sorcery
As an additional cost to cast this spell, discard a card.
Draw two cards and create two Treasure tokens. (They're artifacts with "{T}, Sacrifice this artifact: Add one mana of any color.")
{U}
Ponder
Sorcery
Look at the top three cards of your library, then put them back in any order. You may shuffle.
Draw a card.
{U}
Portent
Sorcery
Look at the top three cards of target player's library, then put them back in any order. You may have that player shuffle.
Draw a card at the beginning of the next turn's upkeep.
{U}
Private Research
Enchantment - Aura
Enchant creature
At the beginning of your upkeep, you may put a page counter on Private Research.
When enchanted creature dies, draw a card for each page counter on Private Research.
{2}{U}
Propaganda
Enchantment
Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you.
{R}
Prophetic Ravings
Enchantment - Aura
Enchant creature
Enchanted creature has haste and "{T}, Discard a card: Draw a card."
{X}{U}
Prosperity
Sorcery
Each player draws X cards.
{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.
* /
*
{1}{U}{R}
Quicksilver Dagger
Enchantment - Aura
Enchant creature
Enchanted creature has "{T}: This creature deals 1 damage to target player or planeswalker. You draw a card."
{4}{U}{R}
Ral, Caller of Storms
Legendary Planeswalker - Ral
+1: Draw a card.
-2: Ral, Caller of Storms deals 3 damage divided as you choose among one, two, or three targets.
-7: Draw seven cards. Ral, Caller of Storms deals 7 damage to each creature your opponents control.
L:
4
--
Reliquary Tower
Land
You have no maximum hand size.
{T}: Add {C}.
{2}{U}
Rhystic Study
Enchantment
Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.
{1}{U}
Saprazzan Heir
Creature - Merfolk
Whenever Saprazzan Heir becomes blocked, you may draw three cards.
1 /
1
--
Scorched Ruins
Land
If Scorched Ruins would enter the battlefield, sacrifice two untapped lands instead. If you do, put Scorched Ruins onto the battlefield. If you don't, put it into its owner's graveyard.
{T}: Add {C}{C}{C}{C}.
--
Sea Gate Wreckage
Land
{T}: Add {C}. ({C} represents colorless mana.)
{2}{C}, {T}: Draw a card. Activate only if you have no cards in hand.
{U}
Sisay's Ingenuity
Enchantment - Aura
Enchant creature
When Sisay's Ingenuity enters the battlefield, draw a card.
Enchanted creature has "{2}{U}: Target creature becomes the color of your choice until end of turn."
{4}
Sisay's Ring
Artifact
{T}: Add {C}{C}.
--
Snow-Covered Island
Basic Snow Land - Island
({T}: Add {U}.)
--
Snow-Covered Island
Basic Snow Land - Island
({T}: Add {U}.)
--
Snow-Covered Island
Basic Snow Land - Island
({T}: Add {U}.)
--
Snow-Covered Island
Basic Snow Land - Island
({T}: Add {U}.)
--
Snow-Covered Island
Basic Snow Land - Island
({T}: Add {U}.)
--
Snow-Covered Island
Basic Snow Land - Island
({T}: Add {U}.)
--
Snow-Covered Island
Basic Snow Land - Island
({T}: Add {U}.)
--
Snow-Covered Island
Basic Snow Land - Island
({T}: Add {U}.)
--
Snow-Covered Island
Basic Snow Land - Island
({T}: Add {U}.)
--
Snow-Covered Island
Basic Snow Land - Island
({T}: Add {U}.)
--
Snow-Covered Island
Basic Snow Land - Island
({T}: Add {U}.)
--
Snow-Covered Mountain
Basic Snow Land - Mountain
({T}: Add {R}.)
--
Snow-Covered Mountain
Basic Snow Land - Mountain
({T}: Add {R}.)
--
Snow-Covered Mountain
Basic Snow Land - Mountain
({T}: Add {R}.)
--
Snow-Covered Mountain
Basic Snow Land - Mountain
({T}: Add {R}.)
--
Snow-Covered Mountain
Basic Snow Land - Mountain
({T}: Add {R}.)
--
Snow-Covered Mountain
Basic Snow Land - Mountain
({T}: Add {R}.)
--
Snow-Covered Mountain
Basic Snow Land - Mountain
({T}: Add {R}.)
--
Snow-Covered Mountain
Basic Snow Land - Mountain
({T}: Add {R}.)
--
Snow-Covered Mountain
Basic Snow Land - Mountain
({T}: Add {R}.)
--
Snow-Covered Mountain
Basic Snow Land - Mountain
({T}: Add {R}.)
--
Snow-Covered Mountain
Basic Snow Land - Mountain
({T}: Add {R}.)
{1}
Sol Ring
Artifact
{T}: Add {C}{C}.
{R}
Spark Spray
Instant
Spark Spray deals 1 damage to any target.
Cycling {R} ({R}, Discard this card: Draw a card.)
{0}
Spellbook
Artifact
You have no maximum hand size.
{6}
Staff of Nin
Artifact
At the beginning of your upkeep, draw a card.
{T}: Staff of Nin deals 1 damage to any target.
--
Steam Vents
Land - Island Mountain
({T}: Add {U} or {R}.)
As Steam Vents enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.
{4}{U}{R}
The Locust God
Legendary Creature - God
Flying
Whenever you draw a card, create a 1/1 blue and red Insect creature token with flying and haste.
{2}{U}{R}: Draw a card, then discard a card.
When The Locust God dies, return it to its owner's hand at the beginning of the next end step.
4 /
4
{4}{U}{U}{U}
Thought Reflection
Enchantment
If you would draw a card, draw two cards instead.
{2}
Thought Vessel
Artifact
You have no maximum hand size.
{T}: Add {C}.
{4}
Thran Dynamo
Artifact
{T}: Add {C}{C}{C}.
{1}{R}
Thrill of Possibility
Instant
As an additional cost to cast this spell, discard a card.
Draw two cards.
{2}{U}
Trail of Evidence
Enchantment
Whenever you cast an instant or sorcery spell, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")
{2}{U}
Traveler's Cloak
Enchantment - Aura
Enchant creature
As Traveler's Cloak enters the battlefield, choose a land type.
When Traveler's Cloak enters the battlefield, draw a card.
Enchanted creature has landwalk of the chosen type. (It can't be blocked as long as defending player controls a land of that type.)
{2}{U}
Verity Circle
Enchantment
Whenever a creature an opponent controls becomes tapped, if it isn't being declared as an attacker, you may draw a card.
{4}{U}: Tap target creature without flying.
--
Volatile Fjord
Snow Land - Island Mountain
({T}: Add {U} or {R}.)
Volatile Fjord enters the battlefield tapped.
--
Volcanic Island
Land - Island Mountain
({T}: Add {U} or {R}.)
{2}{U}
War Tax
Enchantment
{X}{U}: This turn, creatures can't attack unless their controller pays {X} for each attacking creature they control.
{5}{U}
Well of Ideas
Enchantment
When Well of Ideas enters the battlefield, draw two cards.
At the beginning of each other player's draw step, that player draws an additional card.
At the beginning of your draw step, draw two additional cards.
{R}
Winds of Change
Sorcery
Each player shuffles the cards from their hand into their library, then draws that many cards.
{2}{U}
Words of Wind
Enchantment
{1}: The next time you would draw a card this turn, each player returns a permanent they control to its owner's hand instead.