{T}, Pay 1 life, Sacrifice Arid Mesa: Search your library for a Mountain or Plains card, put it onto the battlefield, then shuffle.
{B}{G}
Assassin's Trophy
Instant
Destroy target permanent an opponent controls. Its controller may search their library for a basic land card, put it onto the battlefield, then shuffle.
--
Badlands
Land - Swamp Mountain
({T}: Add {B} or {R}.)
{5}{B}{B}{B}
Baleful Force
Creature - Elemental
At the beginning of each upkeep, you draw a card and you lose 1 life.
7 /
7
--
Bayou
Land - Swamp Forest
({T}: Add {B} or {G}.)
--
Bloodstained Mire
Land
{T}, Pay 1 life, Sacrifice Bloodstained Mire: Search your library for a Swamp or Mountain card, put it onto the battlefield, then shuffle.
--
Cavern of Souls
Land
As Cavern of Souls enters the battlefield, choose a creature type.
{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered.
{5}{W}{W}{W}
Celestial Force
Creature - Elemental
At the beginning of each upkeep, you gain 3 life.
7 /
7
{3}
Chromatic Lantern
Artifact
Lands you control have "{T}: Add one mana of any color."
{T}: Add one mana of any color.
{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.
{3}
Crucible of Worlds
Artifact
You may play lands from your graveyard.
{6}{B}{B}
Decree of Pain
Sorcery
Destroy all creatures. They can't be regenerated. Draw a card for each creature destroyed this way.
Cycling {3}{B}{B} ({3}{B}{B}, Discard this card: Draw a card.)
When you cycle Decree of Pain, all creatures get -2/-2 until end of turn.
{1}{U}
Dreamscape Artist
Creature - Human Spellshaper
{2}{U}, {T}, Discard a card, Sacrifice a land: Search your library for up to two basic land cards, put them onto the battlefield, then shuffle.
1 /
1
{B}
Entomb
Instant
Search your library for a card, put that card into your graveyard, then shuffle.
--
Exotic Orchard
Land
{T}: Add one mana of any color that a land an opponent controls could produce.
{R}
Faithless Looting
Sorcery
Draw two cards, then discard two cards.
Flashback {2}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)
{1}{G}
Fauna Shaman
Creature - Elf Shaman
{G}, {T}, Discard a creature card: Search your library for a creature card, reveal it, put it into your hand, then shuffle.
2 /
2
{2}
Fellwar Stone
Artifact
{T}: Add one mana of any color that a land an opponent controls could produce.
{2}{G}
Fertilid
Creature - Elemental
Fertilid enters the battlefield with two +1/+1 counters on it.
{1}{G}, Remove a +1/+1 counter from Fertilid: Target player searches their library for a basic land card, puts it onto the battlefield tapped, then shuffles.
0 /
0
--
Flooded Strand
Land
{T}, Pay 1 life, Sacrifice Flooded Strand: Search your library for a Plains or Island card, put it onto the battlefield, then shuffle.
{2}{U}
Frantic Search
Instant
Draw two cards, then discard two cards. Untap up to three lands.
{3}
Herald's Horn
Artifact
As Herald's Horn enters the battlefield, choose a creature type.
Creature spells you cast of the chosen type cost {1} less to cast.
At the beginning of your upkeep, look at the top card of your library. If it's a creature card of the chosen type, you may reveal it and put it into your hand.
{W}{U}{B}{R}{G}
Horde of Notions
Legendary Creature - Elemental
Vigilance, trample, haste
{W}{U}{B}{R}{G}: You may play target Elemental card from your graveyard without paying its mana cost.
5 /
5
{4}{R}
Ingot Chewer
Creature - Elemental
When Ingot Chewer enters the battlefield, destroy target artifact.
Evoke {R} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters the battlefield.)
3 /
3
{5}{B}{B}
Kindred Dominance
Sorcery
Choose a creature type. Destroy all creatures that aren't of the chosen type.
{2}{G}
Kodama's Reach
Sorcery - Arcane
Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.
{2}
Lightning Greaves
Artifact - Equipment
Equipped creature has haste and shroud. (It can't be the target of spells or abilities.)
Equip {0}
{W}{U}{B}{R}{G}
Maelstrom Nexus
Enchantment
The first spell you cast each turn has cascade. (When you cast your first spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.)
{5}{G}{U}{R}
Maelstrom Wanderer
Legendary Creature - Elemental
Creatures you control have haste.
Cascade, cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order. Then do it again.)
7 /
5
{5}{R}{R}{R}
Magmatic Force
Creature - Elemental
At the beginning of each upkeep, Magmatic Force deals 3 damage to any target.
7 /
7
--
Marsh Flats
Land
{T}, Pay 1 life, Sacrifice Marsh Flats: Search your library for a Plains or Swamp card, put it onto the battlefield, then shuffle.
--
Misty Rainforest
Land
{T}, Pay 1 life, Sacrifice Misty Rainforest: Search your library for a Forest or Island card, put it onto the battlefield, then shuffle.
{4}{U}
Mulldrifter
Creature - Elemental
Flying
When Mulldrifter enters the battlefield, draw two cards.
Evoke {2}{U} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters the battlefield.)
2 /
2
{W}
Path to Exile
Instant
Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.
--
Plateau
Land - Mountain Plains
({T}: Add {R} or {W}.)
--
Polluted Delta
Land
{T}, Pay 1 life, Sacrifice Polluted Delta: Search your library for an Island or Swamp card, put it onto the battlefield, then shuffle.
{B}
Reanimate
Sorcery
Put target creature card from a graveyard onto the battlefield under your control. You lose life equal to its mana value.
{4}{W}
Reveillark
Creature - Elemental
Flying
When Reveillark leaves the battlefield, return up to two target creature cards with power 2 or less from your graveyard to the battlefield.
Evoke {5}{W} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters the battlefield.)
4 /
3
--
Savannah
Land - Forest Plains
({T}: Add {G} or {W}.)
--
Scalding Tarn
Land
{T}, Pay 1 life, Sacrifice Scalding Tarn: Search your library for an Island or Mountain card, put it onto the battlefield, then shuffle.
--
Scrubland
Land - Plains Swamp
({T}: Add {W} or {B}.)
{4}{B}
Shriekmaw
Creature - Elemental
Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)
When Shriekmaw enters the battlefield, destroy target nonartifact, nonblack creature.
Evoke {1}{B} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters the battlefield.)
3 /
2
{1}
Sol Ring
Artifact
{T}: Add {C}{C}.
{W}
Swords to Plowshares
Instant
Exile target creature. Its controller gains life equal to its power.
--
Taiga
Land - Mountain Forest
({T}: Add {R} or {G}.)
{2}{W}
Teferi's Protection
Instant
Until your next turn, your life total can't change and you gain protection from everything. All permanents you control phase out. (While they're phased out, they're treated as though they don't exist. They phase in before you untap during your untap step.)