{T}, Pay 1 life, Sacrifice Arid Mesa: Search your library for a Mountain or Plains card, put it onto the battlefield, 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.
{U}
Brainstorm
Instant
Draw three cards, then put two cards from your hand on top of your library in any order.
--
Clifftop Retreat
Land
Clifftop Retreat enters tapped unless you control a Mountain or a Plains.
{T}: Add {R} or {W}.
--
Command Tower
Land
{T}: Add one mana of any color in your commander's color identity.
{U}{U}
Counterspell
Instant
Counter target spell.
{1}{U}
Cyclonic Rift
Instant
Return target nonland permanent you don't control to its owner's hand.
Overload {6}{U} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")
{1}{U}
Daze
Instant
You may return an Island you control to its owner's hand rather than pay this spell's mana cost.
Counter target spell unless its controller pays {1}.
{U}
Delver of Secrets
Creature - Human Wizard
At the beginning of your upkeep, look at the top card of your library. You may reveal that card. If an instant or sorcery card is revealed this way, transform Delver of Secrets.
1 /
1
--
Insectile Aberration
Creature - Human Insect
Flying
1 /
1
{1}{U}{R}
Electrolyze
Instant
Electrolyze deals 2 damage divided as you choose among one or two targets.
Draw a card.
--
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.
{1}{W}{U}
Geist of Saint Traft
Legendary Creature - Spirit Cleric
Hexproof (This creature can't be the target of spells or abilities your opponents control.)
Whenever Geist of Saint Traft attacks, create a 4/4 white Angel creature token with flying that's tapped and attacking. Exile that token at end of combat.
2 /
2
{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.
--
Glacial Fortress
Land
Glacial Fortress enters tapped unless you control a Plains or an Island.
{T}: Add {W} or {U}.
--
Hallowed Fountain
Land - Plains Island
({T}: Add {W} or {U}.)
As Hallowed Fountain enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.
--
Island
Basic Land - Island
({T}: Add {U}.)
{U}{R}{W}
Jeskai Ascendancy
Enchantment
Whenever you cast a noncreature spell, creatures you control get +1/+1 until end of turn. Untap those creatures.
Whenever you cast a noncreature spell, you may draw a card. If you do, discard a card.
{U}{R}{W}
Jeskai Charm
Instant
Choose one --
• Put target creature on top of its owner's library.
• Jeskai Charm deals 4 damage to target opponent or planeswalker.
• Creatures you control get +1/+1 and gain lifelink until end of turn.
{R}
Lightning Bolt
Instant
Lightning Bolt deals 3 damage to any target.
{R}{W}
Lightning Helix
Instant
Lightning Helix deals 3 damage to any target and you gain 3 life.
{U/P}
Mental Misstep
Instant
({U/P} can be paid with either {U} or 2 life.)
Counter target spell with mana value 1.
{1}{R}
Mizzium Mortars
Sorcery
Mizzium Mortars deals 4 damage to target creature you don't control.
Overload {3}{R}{R}{R} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")
{2}{W}
Monastery Mentor
Creature - Human Monk
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Whenever you cast a noncreature spell, create a 1/1 white Monk creature token with prowess.
2 /
2
{R}
Monastery Swiftspear
Creature - Human Monk
Haste
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
1 /
2
{W}
Mother of Runes
Creature - Human Cleric
{T}: Target creature you control gains protection from the color of your choice until end of turn.
1 /
1
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
{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.
--
Plains
Basic Land - Plains
({T}: Add {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.
{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}
Preordain
Sorcery
Scry 2, then draw a card. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)
{1}{U}
Remand
Instant
Counter target spell. If that spell is countered this way, put it into its owner's hand instead of into that player's graveyard.
Draw a card.
--
Sacred Foundry
Land - Mountain Plains
({T}: Add {R} or {W}.)
As Sacred Foundry enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.
--
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.
{1}{W}
Seeker of the Way
Creature - Human Warrior
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Whenever you cast a noncreature spell, Seeker of the Way gains lifelink until end of turn.
2 /
2
{U}
Serum Visions
Sorcery
Draw a card. Scry 2.
--
Shivan Reef
Land
{T}: Add {C}.
{T}: Add {U} or {R}. Shivan Reef deals 1 damage to you.
{2}{U}
Shu Yun, the Silent Tempest
Legendary Creature - Human Monk
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Whenever you cast a noncreature spell, you may pay {R/W}{R/W}. If you do, target creature gains double strike until end of turn.
3 /
2
{1}{U}
Snapcaster Mage
Creature - Human Wizard
Flash
When Snapcaster Mage enters the battlefield, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)
2 /
1
{U}
Spell Pierce
Instant
Counter target noncreature spell unless its controller pays {2}.
{U}
Spell Snare
Instant
Counter target spell with mana value 2.
{X}{W}{U}{U}
Sphinx's Revelation
Instant
You gain X life and draw X cards.
--
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.
{U}{R}
Stormchaser Mage
Creature - Human Wizard
Flying, haste
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
1 /
3
--
Sulfur Falls
Land
Sulfur Falls enters tapped unless you control an Island or a Mountain.
{T}: Add {U} or {R}.
{W}
Swords to Plowshares
Instant
Exile target creature. Its controller gains life equal to its power.
{1}{U}{U}
True-Name Nemesis
Creature - Merfolk Rogue
As True-Name Nemesis enters the battlefield, choose a player.
True-Name Nemesis has protection from the chosen player.
3 /
1
{1}{U}{U}
Vendilion Clique
Legendary Creature - Faerie Wizard
Flash
Flying
When Vendilion Clique enters the battlefield, look at target player's hand. You may choose a nonland card from it. If you do, that player reveals the chosen card, puts it on the bottom of their library, then draws a card.
3 /
1
--
Volcanic Island
Land - Island Mountain
({T}: Add {U} or {R}.)
{1}{R}
Young Pyromancer
Creature - Human Shaman
Whenever you cast an instant or sorcery spell, create a 1/1 red Elemental creature token.
2 /
1
{1}{U}{R}
Dack Fayden
Legendary Planeswalker - Dack
+1: Target player draws two cards, then discards two cards.
-2: Gain control of target artifact.
-6: You get an emblem with "Whenever you cast a spell that targets one or more permanents, gain control of those permanents."
L:
3
{1}{W}
Disenchant
Instant
Destroy target artifact or enchantment.
{X}
Engineered Explosives
Artifact
Sunburst (This enters with a charge counter on it for each color of mana spent to cast it.)
{2}, Sacrifice Engineered Explosives: Destroy each nonland permanent with mana value equal to the number of charge counters on Engineered Explosives.
{U}
Flusterstorm
Instant
Counter target instant or sorcery spell unless its controller pays {1}.
Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)
{U}
Hydroblast
Instant
Choose one --
• Counter target spell if it's red.
• Destroy target permanent if it's red.
{U}
Pteramander
Creature - Salamander Drake
Flying
{7}{U}: Adapt 4. This ability costs {1} less to activate for each instant and sorcery card in your graveyard. (If this creature has no +1/+1 counters on it, put four +1/+1 counters on it.)
1 /
1
{R}
Pyroblast
Instant
Choose one --
• Counter target spell if it's blue.
• Destroy target permanent if it's blue.
{1}{W}
Rest in Peace
Enchantment
When Rest in Peace enters, exile all graveyards.
If a card or token would be put into a graveyard from anywhere, exile it instead.
{1}{W}
Stony Silence
Enchantment
Activated abilities of artifacts can't be activated.
{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.)