{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.
--
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.")
{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 the battlefield tapped unless you control a Plains or an Island.
{T}: Add {W} or {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}{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.
{1}{R}
Kiln Fiend
Creature - Elemental Beast
Whenever you cast an instant or sorcery spell, Kiln Fiend gets +3/+0 until end of turn.
1 /
2
{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.
{1}{U}
Mana Leak
Instant
Counter target spell unless its controller pays {3}.
{U}{R}{W}
Mantis Rider
Creature - Human Monk
Flying, vigilance, haste
3 /
3
{U/P}
Mental Misstep
Instant
({U/P} can be paid with either {U} or 2 life.)
Counter target spell with mana value 1.
{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}.)
--
Mystic Monastery
Land
Mystic Monastery enters the battlefield tapped.
{T}: Add {U}, {R}, or {W}.
{1}{U}{R}
Nivix Cyclops
Creature - Cyclops
Defender
Whenever you cast an instant or sorcery spell, Nivix Cyclops gets +3/+0 until end of turn and can attack this turn as though it didn't have defender.
1 /
4
{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}.)
--
Plateau
Land - Mountain Plains
({T}: Add {R} or {W}.)
{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.
--
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
{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}
Snap
Instant
Return target creature to its owner's hand. Untap up to two lands.
{1}{W}
Soulfire Grand Master
Creature - Human Monk
Lifelink
Instant and sorcery spells you control have lifelink.
{2}{U/R}{U/R}: The next time you cast an instant or sorcery spell from your hand this turn, put that card into your hand instead of into your graveyard as it resolves.
2 /
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.
{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 the battlefield 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.
--
Temple of Enlightenment
Land
Temple of Enlightenment enters the battlefield tapped.
When Temple of Enlightenment enters the battlefield, scry 1.
{T}: Add {W} or {U}.
--
Temple of Epiphany
Land
Temple of Epiphany enters the battlefield tapped.
When Temple of Epiphany enters the battlefield, scry 1.
{T}: Add {U} or {R}.
{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
--
Tundra
Land - Plains Island
({T}: Add {W} or {U}.)
--
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.