Draw cards equal to the number of cards in your hand, then discard a card for each card drawn this way.
Basic landcycling {2} ({2}, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)
--
Arcane Sanctum
Land
Arcane Sanctum enters the battlefield tapped.
{T}: Add {W}, {U}, or {B}.
{2}
Arcane Signet
Artifact
{T}: Add one mana of any color in your commander's color identity.
{1}{U/B}{U/B}
Ashiok, Dream Render
Legendary Planeswalker - Ashiok
Spells and abilities your opponents control can't cause their controller to search their library.
-1: Target player mills four cards. Then exile each opponent's graveyard.
L:
5
{5}{R}{G}
Atarka, World Render
Legendary Creature - Dragon
Flying, trample
Whenever a Dragon you control attacks, it gains double strike until end of turn.
6 /
4
{W/U}{W/U}
Azorius Guildmage
Creature - Vedalken Wizard
{2}{W}: Tap target creature.
{2}{U}: Counter target activated ability. (Mana abilities can't be targeted.)
2 /
2
--
Bant Panorama
Land
{T}: Add {C}.
{1}, {T}, Sacrifice Bant Panorama: Search your library for a basic Forest, Plains, or Island card, put it onto the battlefield tapped, then shuffle.
{R}{W}
Boros Charm
Instant
Choose one --
• Boros Charm deals 4 damage to target player or planeswalker.
• Permanents you control gain indestructible until end of turn.
• Target creature gains double strike until end of turn.
{1}{U}{R}
Cerebral Vortex
Instant
Target player draws two cards, then Cerebral Vortex deals damage to that player equal to the number of cards they've drawn this turn.
{3}
Chromatic Lantern
Artifact
Lands you control have "{T}: Add one mana of any color."
{T}: Add one mana of any color.
{U/R}
Clout of the Dominus
Enchantment - Aura
Enchant creature
As long as enchanted creature is blue, it gets +1/+1 and has shroud. (It can't be the target of spells or abilities.)
As long as enchanted creature is red, it gets +1/+1 and has haste.
{G}{U}
Coiling Oracle
Creature - Snake Elf Druid
When Coiling Oracle enters, reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put that card into your hand.
1 /
1
--
Command Tower
Land
{T}: Add one mana of any color in your commander's color identity.
{3}
Commander's Sphere
Artifact
{T}: Add one mana of any color in your commander's color identity.
Sacrifice Commander's Sphere: Draw a card.
--
Crumbling Necropolis
Land
Crumbling Necropolis enters the battlefield tapped.
{T}: Add {U}, {B}, or {R}.
{3}
Darksteel Ingot
Artifact
Indestructible (Effects that say "destroy" don't destroy this artifact.)
{T}: Add one mana of any color.
{X}{W}{W}{B}{B}
Debt to the Deathless
Sorcery
Each opponent loses two times X life. You gain life equal to the life lost this way.
{W}{B}
Despark
Instant
Exile target permanent with mana value 4 or greater.
{U/B}{U/B}
Dimir Guildmage
Creature - Human Wizard
({U/B} can be paid with either {U} or {B}.)
{3}{U}: Target player draws a card. Activate only as a sorcery.
{3}{B}: Target player discards a card. Activate only as a sorcery.
2 /
2
{1}{U/B}{ // }{3}{U}{B}
Discovery // Dispersal
Sorcery // Instant
Surveil 2, then draw a card. (To surveil 2, look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)
Each opponent returns a nonland permanent they control with the highest mana value among permanents they control to its owner's hand, then discards a card.
{3}{B}{ // }{2}{G}
Down // Dirty
Sorcery // Sorcery
Target player discards two cards.
Fuse (You may cast one or both halves of this card from your hand.)
Return target card from your graveyard to your hand.
Fuse (You may cast one or both halves of this card from your hand.)
{3}
Dragon's Hoard
Artifact
Whenever a Dragon enters the battlefield under your control, put a gold counter on Dragon's Hoard.
{T}, Remove a gold counter from Dragon's Hoard: Draw a card.
{T}: Add one mana of any color.
{3}{G}{W}
Dromoka, the Eternal
Legendary Creature - Dragon
Flying
Whenever a Dragon you control attacks, bolster 2. (Choose a creature with the least toughness among creatures you control and put two +1/+1 counters on it.)
5 /
5
{R/W}
Duergar Assailant
Creature - Dwarf Soldier
Sacrifice Duergar Assailant: It deals 1 damage to target attacking or blocking creature.
{1}, {T}, Sacrifice Esper Panorama: Search your library for a basic Plains, Island, or Swamp card, put it onto the battlefield tapped, then shuffle.
--
Evolving Wilds
Land
{T}, Sacrifice Evolving Wilds: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
--
Exotic Orchard
Land
{T}: Add one mana of any color that a land an opponent controls could produce.
{2}
Fellwar Stone
Artifact
{T}: Add one mana of any color that a land an opponent controls could produce.
{1}{R}{G}
Fires of Yavimaya
Enchantment
Creatures you control have haste.
Sacrifice Fires of Yavimaya: Target creature gets +2/+2 until end of turn.
--
Forest
Basic Land - Forest
({T}: Add {G}.)
--
Forest
Basic Land - Forest
({T}: Add {G}.)
--
Forest
Basic Land - Forest
({T}: Add {G}.)
--
Forest
Basic Land - Forest
({T}: Add {G}.)
--
Frontier Bivouac
Land
Frontier Bivouac enters the battlefield tapped.
{T}: Add {G}, {U}, or {R}.
{B}{G}
Golgari Charm
Instant
Choose one --
• All creatures get -1/-1 until end of turn.
• Destroy target enchantment.
• Regenerate each creature you control.
{4}{B}{R}
Grave Upheaval
Sorcery
Put target creature card from a graveyard onto the battlefield under your control. It gains haste.
Basic landcycling {2} ({2}, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)
{B}{G}
Grisly Salvage
Instant
Reveal the top five cards of your library. You may put a creature or land card from among them into your hand. Put the rest into your graveyard.
--
Grixis Panorama
Land
{T}: Add {C}.
{1}, {T}, Sacrifice Grixis Panorama: Search your library for a basic Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle.
{G}{U}
Growth Spiral
Instant
Draw a card. You may put a land card from your hand onto the battlefield.
{2}{R}{W}
Heartwarming Redemption
Instant
Discard all the cards in your hand, then draw that many cards plus one. You gain life equal to the number of cards in your hand.
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
{U}{R}
Izzet Charm
Instant
Choose one --
• Counter target noncreature spell unless its controller pays {2}.
• Izzet Charm deals 2 damage to target creature.
• Draw two cards, then discard two cards.
{U/R}{U/R}
Izzet Guildmage
Creature - Human Wizard
({U/R} can be paid with either {U} or {R}.)
{2}{U}: Copy target instant spell you control with mana value 2 or less. You may choose new targets for the copy.
{2}{R}: Copy target sorcery spell you control with mana value 2 or less. You may choose new targets for the copy.
2 /
2
--
Jund Panorama
Land
{T}: Add {C}.
{1}, {T}, Sacrifice Jund Panorama: Search your library for a basic Swamp, Mountain, or Forest card, put it onto the battlefield tapped, then shuffle.
--
Jungle Shrine
Land
Jungle Shrine enters the battlefield tapped.
{T}: Add {R}, {G}, or {W}.
{1}{W}{B}
Kaya's Guile
Instant
Choose two --
• Each opponent sacrifices a creature.
• Exile all opponents' graveyards.
• Create a 1/1 white and black Spirit creature token with flying.
• You gain 4 life.
Entwine {3} (Choose all if you pay the entwine cost.)
{3}{B}{R}
Kolaghan, the Storm's Fury
Legendary Creature - Dragon
Flying
Whenever a Dragon you control attacks, creatures you control get +1/+0 until end of turn.
Dash {3}{B}{R} (You may cast this spell for its dash cost. If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.)
4 /
5
{1}{B}{R}
Last One Standing
Sorcery
Choose a creature at random, then destroy the rest.
{3}
Mana Geode
Artifact
When Mana Geode enters the battlefield, scry 1.
{T}: Add one mana of any color.
{B/R}
Manaforge Cinder
Creature - Elemental Shaman
{1}: Add {B} or {R}. Activate no more than three times each turn.
1 /
1
{4}{W}{B}
Merciless Eviction
Sorcery
Choose one --
• Exile all artifacts.
• Exile all creatures.
• Exile all enchantments.
• Exile all planeswalkers.
{3}{W}{U}
Migratory Route
Sorcery
Create four 1/1 white Bird creature tokens with flying.
Basic landcycling {2} ({2}, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mystic Monastery
Land
Mystic Monastery enters tapped.
{T}: Add {U}, {R}, or {W}.
--
Naya Panorama
Land
{T}: Add {C}.
{1}, {T}, Sacrifice Naya Panorama: Search your library for a basic Mountain, Forest, or Plains card, put it onto the battlefield tapped, then shuffle.
{W}{U}{B}{R}{G}
Niv-Mizzet Reborn
Legendary Creature - Dragon Avatar
Flying
When Niv-Mizzet Reborn enters the battlefield, reveal the top ten cards of your library. For each color pair, choose a card that's exactly those colors from among them. Put the chosen cards into your hand and the rest on the bottom of your library in a random order.
6 /
6
--
Nomad Outpost
Land
Nomad Outpost enters tapped.
{T}: Add {R}, {W}, or {B}.
{B/G}
Odious Trow
Creature - Troll
{1}{B/G}: Regenerate Odious Trow.
1 /
1
{5}{W}{U}
Ojutai, Soul of Winter
Legendary Creature - Dragon
Flying, vigilance
Whenever a Dragon you control attacks, tap target nonland permanent an opponent controls. That permanent doesn't untap during its controller's next untap step.
5 /
6
--
Opulent Palace
Land
Opulent Palace enters the battlefield tapped.
{T}: Add {B}, {G}, or {U}.
{W/B}{W/B}
Orzhov Guildmage
Creature - Human Wizard
{2}{W}: Target player gains 1 life.
{2}{B}: Each player loses 1 life.
2 /
2
--
Plains
Basic Land - Plains
({T}: Add {W}.)
--
Plains
Basic Land - Plains
({T}: Add {W}.)
--
Plains
Basic Land - Plains
({T}: Add {W}.)
--
Plains
Basic Land - Plains
({T}: Add {W}.)
{B}{R}
Rakdos Charm
Instant
Choose one --
• Exile target player's graveyard.
• Destroy target artifact.
• Each creature deals 1 damage to its controller.
{G}{W}
Reborn Hope
Sorcery
Return target multicolored card from your graveyard to your hand.
{1}{R}{G}
Rhythm of the Wild
Enchantment
Creature spells you control can't be countered.
Nontoken creatures you control have riot. (They enter the battlefield with your choice of a +1/+1 counter or haste.)
--
Sandsteppe Citadel
Land
Sandsteppe Citadel enters the battlefield tapped.
{T}: Add {W}, {B}, or {G}.
--
Savage Lands
Land
Savage Lands enters the battlefield tapped.
{T}: Add {B}, {R}, or {G}.
--
Seaside Citadel
Land
Seaside Citadel enters tapped.
{T}: Add {G}, {W}, or {U}.
{4}{U}{B}
Silumgar, the Drifting Death
Legendary Creature - Dragon
Flying, hexproof
Whenever a Dragon you control attacks, creatures defending player controls get -1/-1 until end of turn.
3 /
7
{G}{U}
Simic Charm
Instant
Choose one --
• Target creature gets +3/+3 until end of turn.
• Permanents you control gain hexproof until end of turn.
• Return target creature to its owner's hand.
{G/U}{G/U}
Simic Guildmage
Creature - Elf Wizard
({G/U} can be paid with either {G} or {U}.)
{1}{G}: Move a +1/+1 counter from target creature onto another target creature with the same controller.
{1}{U}: Attach target Aura attached to a permanent to another permanent with the same controller.
2 /
2
{3}
Skyclave Relic
Artifact
Kicker {3}
Indestructible
When Skyclave Relic enters the battlefield, if it was kicked, create two tapped tokens that are copies of Skyclave Relic.
{T}: Add one mana of any color.
{2}{R}{W}
Solar Blaze
Sorcery
Each creature deals damage to itself equal to its power.
{2}{W}{U}
Sphinx's Insight
Instant
Draw two cards.
Addendum -- If you cast this spell during your main phase, you gain 2 life.
{2}{G}{ // }{4}{U}{U}
Spring // Mind
Sorcery // Instant
Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
Aftermath (Cast this spell only from your graveyard. Then exile it.)
Draw two cards.
{2}{U}{R}
Steam Augury
Instant
Reveal the top five cards of your library and separate them into two piles. An opponent chooses one of those piles. Put that pile into your hand and the other into your graveyard.
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
{3}{G}{W}
Sylvan Reclamation
Instant
Exile up to two target artifacts and/or enchantments.
Basic landcycling {2} ({2}, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)
--
Terramorphic Expanse
Land
{T}, Sacrifice Terramorphic Expanse: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
{2}{W}{W}{U}
Time Wipe
Sorcery
Return a creature you control to its owner's hand, then destroy all creatures.
{6}{R}{G}
Treacherous Terrain
Sorcery
Treacherous Terrain deals damage to each opponent equal to the number of lands that player controls.
Basic landcycling {2} ({2}, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)
{B}{G}
Treasured Find
Sorcery
Return target card from your graveyard to your hand. Exile Treasured Find.
{3}
Vessel of Endless Rest
Artifact
When Vessel of Endless Rest enters the battlefield, put target card from a graveyard on the bottom of its owner's library.
{T}: Add one mana of any color.
{1}
Wayfarer's Bauble
Artifact
{2}, {T}, Sacrifice Wayfarer's Bauble: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.
{1}{R}{ // }{W}
Wear // Tear
Instant // Instant
Destroy target artifact.
Fuse (You may cast one or both halves of this card from your hand.)
Destroy target enchantment.
Fuse (You may cast one or both halves of this card from your hand.)
{1}{G}{W}
Wellspring
Enchantment - Aura
Enchant land
When Wellspring enters the battlefield, gain control of enchanted land until end of turn.
At the beginning of your upkeep, untap enchanted land. You gain control of that land until end of turn.