As an additional cost to cast this spell, sacrifice a creature.
Search your library for a creature card, reveal it, put it into your hand, then shuffle.
{2}{U}{B}
Ancient Excavation
Instant
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.)
--
Ancient Ziggurat
Land
{T}: Add one mana of any color. Spend this mana only to cast a creature spell.
{2}{G}{W}
Applejack
Legendary Creature - Pony
Family Gathering -- At the beginning of your end step, put a toy you own onto the battlefield as a 2/2 creature token with that toy's name, colors, and creature types. If the toy has wings, the token has flying. If the toy has a horn, scry 2. If it has neither, create a Food token.
4 /
4
{3}{W}
Arborea Pegasus
Creature - Pegasus
Flying
When Arborea Pegasus enters the battlefield, target creature gets +1/+1 and gains flying until end of turn.
2 /
3
{2}{W}{W}
Archon of Sun's Grace
Creature - Archon
Flying, lifelink
Pegasus creatures you control have lifelink.
Constellation -- Whenever an enchantment enters the battlefield under your control, create a 2/2 white Pegasus creature token with flying.
3 /
4
--
Archway Commons
Land
Archway Commons enters the battlefield tapped.
When Archway Commons enters the battlefield, sacrifice it unless you pay {1}.
{T}: Add one mana of any color.
{1}{W}
Armored Pegasus
Creature - Pegasus
Flying
1 /
2
{B}{G}
Assemble the Team
Sorcery
Search the top third of your library, rounded up, for a card. Put that card into your hand, then shuffle.
{2}{W}
Boreas Charger
Creature - Pegasus
Flying
When Boreas Charger leaves the battlefield, choose an opponent who controls more lands than you. Search your library for a number of Plains cards equal to the difference, reveal those cards, put one of them onto the battlefield tapped and the rest into your hand, then shuffle.
2 /
1
{2}{W}
Brightmare
Creature - Unicorn
When Brightmare enters the battlefield, tap up to one target creature. You gain life equal to that creature's power.
2 /
3
{3}
Burnished Hart
Artifact Creature - Elk
{3}, Sacrifice Burnished Hart: Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.
2 /
2
{1}{W}
Capashen Unicorn
Creature - Unicorn
{1}{W}, {T}, Sacrifice Capashen Unicorn: Destroy target artifact or enchantment.
1 /
2
--
Captivating Cave
Land - Cave
{T}: Add {C}.
{1}, {T}: Add one mana of any color.
{4}, {T}, Sacrifice Captivating Cave: Put two +1/+1 counters on target creature. Activate only as a sorcery.
{1}{W}
Cavalry Pegasus
Creature - Pegasus
Flying
Whenever Cavalry Pegasus attacks, each attacking Human gains flying until end of turn.
1 /
1
--
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.
{2}{W}
Celestial Unicorn
Creature - Unicorn
Whenever you gain life, put a +1/+1 counter on Celestial Unicorn.
3 /
2
--
City of Brass
Land
Whenever City of Brass becomes tapped, it deals 1 damage to you.
{T}: Add one mana of any color.
--
Command Tower
Land
{T}: Add one mana of any color in your commander's color identity.
{1}{W}
Concordia Pegasus
Creature - Pegasus
Flying
1 /
3
{2}{U}
Curse of the Bloody Tome
Enchantment - Aura Curse
Enchant player
At the beginning of enchanted player's upkeep, that player mills two cards.
{1}{W}
Daybreak Charger
Creature - Unicorn
When Daybreak Charger enters the battlefield, target creature gets +2/+0 until end of turn.
3 /
1
{1}{B}
Demonic Tutor
Sorcery
Search your library for a card, put that card into your hand, then shuffle.
{2}{B}{B}
Diabolic Tutor
Sorcery
Search your library for a card, put that card into your hand, then shuffle.
{4}
Emmessi Tome
Artifact
{5}, {T}: Draw two cards, then discard a card.
--
Exotic Orchard
Land
{T}: Add one mana of any color that a land an opponent controls could produce.
{1}{G}{W}
Fluttershy
Legendary Creature - Pegasus
Defender, flying
{1}, {T}: Put a +1/+1 counter on each creature with a tail target player controls. Stare down up to one target creature until end of turn. (It can't attack or block as long as you're looking directly at it.)
0 /
4
{4}
Fool's Tome
Artifact
{2}, {T}: Draw a card. Activate only if you have no cards in hand.
--
Forbidden Orchard
Land
{T}: Add one mana of any color.
Whenever you tap Forbidden Orchard for mana, target opponent creates a 1/1 colorless Spirit creature token.
--
Gateway Plaza
Land - Gate
Gateway Plaza enters the battlefield tapped.
When Gateway Plaza enters the battlefield, sacrifice it unless you pay {1}.
{T}: Add one mana of any color.
--
Gemstone Caverns
Legendary Land
If Gemstone Caverns is in your opening hand and you're not the starting player, you may begin the game with Gemstone Caverns on the battlefield with a luck counter on it. If you do, exile a card from your hand.
{T}: Add {C}. If Gemstone Caverns has a luck counter on it, instead add one mana of any color.
--
Gemstone Mine
Land
Gemstone Mine enters the battlefield with three mining counters on it.
{T}, Remove a mining counter from Gemstone Mine: Add one mana of any color. If there are no mining counters on Gemstone Mine, sacrifice it.
--
Glimmervoid
Land
At the beginning of the end step, if you control no artifacts, sacrifice Glimmervoid.
{T}: Add one mana of any color.
--
Grand Coliseum
Land
Grand Coliseum enters the battlefield tapped.
{T}: Add {C}.
{T}: Add one mana of any color. Grand Coliseum deals 1 damage to you.
--
Great Hall of the Citadel
Land
{T}: Add {C}.
{1}, {T}: Add two mana in any combination of colors. Spend this mana only to cast legendary spells.
{1}{B}{B}
Grim Tutor
Sorcery
Search your library for a card, put that card into your hand, then shuffle. You lose 3 life.
--
Holdout Settlement
Land
{T}: Add {C}. ({C} represents colorless mana.)
{T}, Tap an untapped creature you control: Add one mana of any color.
{2}{W}{W}
Inspiring Unicorn
Creature - Unicorn
Whenever Inspiring Unicorn attacks, creatures you control get +1/+1 until end of turn.
2 /
2
{3}
Jalum Tome
Artifact
{2}, {T}: Draw a card, then discard a card.
{4}
Jayemdae Tome
Artifact
{4}, {T}: Draw a card.
--
Lotus Vale
Land
If Lotus Vale would enter the battlefield, sacrifice two untapped lands instead. If you do, put Lotus Vale onto the battlefield. If you don't, put it into its owner's graveyard.
{T}: Add three mana of any one color.
{W}
Loyal Pegasus
Creature - Pegasus
Flying
Loyal Pegasus can't attack or block alone.
2 /
1
--
Mana Confluence
Land
{T}, Pay 1 life: Add one mana of any color.
{5}
Mangara's Tome
Artifact
When Mangara's Tome enters the battlefield, search your library for five cards, exile them in a face-down pile, and shuffle that pile. Then shuffle your library.
{2}: The next time you would draw a card this turn, instead put the top card of the exiled pile into its owner's hand.
{2}
Mazemind Tome
Artifact
{T}, Put a page counter on Mazemind Tome: Scry 1.
{2}, {T}, Put a page counter on Mazemind Tome: Draw a card.
When there are four or more page counters on Mazemind Tome, exile it. If you do, you gain 4 life.
{1}{W}
Mesa Pegasus
Creature - Pegasus
Flying; banding (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)
1 /
1
{1}{W}
Mistral Charger
Creature - Pegasus
Flying
2 /
1
{2}{U}
Mysterious Tome
Artifact
{2}, {T}: Draw a card. Transform Mysterious Tome.
--
Chilling Chronicle
Artifact
{1}, {T}: Tap target nonland permanent. Transform Chilling Chronicle.
{4}
Mystic Forge
Artifact
You may look at the top card of your library any time.
You may cast artifact spells and colorless spells from the top of your library.
{T}, Pay 1 life: Exile the top card of your library.
{3}
Opaline Unicorn
Artifact Creature - Unicorn
{T}: Add one mana of any color.
1 /
2
{G}{W}
Park Heights Pegasus
Creature - Pegasus
Flying, trample
Whenever Park Heights Pegasus deals combat damage to a player, draw a card if you had two or more creatures enter the battlefield under your control this turn.
2 /
1
--
Path of Ancestry
Land
Path of Ancestry enters the battlefield tapped.
{T}: Add one mana of any color in your commander's color identity. When that mana is spent to cast a creature spell that shares a creature type with your commander, scry 1. (Look at the top card of your library. You may put that card on the bottom.)
{2}{W}
Pegasus Charger
Creature - Pegasus
Flying (This creature can't be blocked except by creatures with flying or reach.)
First strike (This creature deals combat damage before creatures without first strike.)
2 /
1
{2}{W}
Pegasus Courser
Creature - Pegasus
Flying
Whenever Pegasus Courser attacks, another target attacking creature gains flying until end of turn.
1 /
3
{5}{W}{ // }{1}{W}
Pegasus Guardian // Rescue the Foal
Creature - Pegasus // Instant - Adventure
Flying
At the beginning of your end step, if a permanent you controlled left the battlefield this turn, create a 1/1 white Pegasus creature token with flying.
Exile target creature you control, then return that card to the battlefield under its owner's control. (Then exile this card. You may cast the creature later from exile.)
3 /
3
{2}{W}
Phyrexian Pegasus
Creature - Phyrexian Pegasus
Flying
Whenever Phyrexian Pegasus attacks, another target attacking creature without flying gains flying until end of turn.
2 /
2
--
Pillar of the Paruns
Land
{T}: Add one mana of any color. Spend this mana only to cast a multicolored spell.
{R}{W}
Pinkie Pie
Legendary Creature - Pony
Whenever you cast a spell with a smile in its art, create a tapped Treasure token.
Everypony's Invited -- Your party consists of each creature you control, and your party is always full.
2 /
2
--
Pit of Offerings
Land - Cave
Pit of Offerings enters the battlefield tapped.
When Pit of Offerings enters the battlefield, exile up to three target cards from graveyards.
{T}: Add {C}.
{T}: Add one mana of any of the exiled cards' colors.
{2}{W}
Plated Pegasus
Creature - Pegasus
Flash (You may cast this spell any time you could cast an instant.)
Flying
If a spell would deal damage to a permanent or player, prevent 1 damage that spell would deal to that permanent or player.
1 /
2
--
Plaza of Heroes
Land
{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast a legendary spell.
{T}: Add one mana of any color among legendary permanents you control.
{3}, {T}, Exile Plaza of Heroes: Target legendary creature gains hexproof and indestructible until end of turn.
{2}{B}{R}
Prosper, Tome-Bound
Legendary Creature - Tiefling Warlock
Deathtouch
Mystic Arcanum -- At the beginning of your end step, exile the top card of your library. Until the end of your next turn, you may play that card.
Pact Boon -- Whenever you play a card from exile, create a Treasure token.
1 /
4
{1}{R}{W}
Rainbow Dash
Legendary Creature - Pegasus
Flying, haste
Whenever a creature you control with flying and/or haste attacks, you get 20% cooler. (You start at 0% coolness.)
Sonic Rainboom -- {T}: If you're at least 100% cool, add {W}{U}{B}{R}{G}, draw a card, and reset your coolness.
2 /
2
{1}{W}{U}
Rarity
Legendary Creature - Unicorn
Rare and mythic rare spells you cast cost {1} less to cast.
{1}, {T}, Reveal a My Little Pony® toy you own: Until end of turn, another target creature gains protection from each color in that toy's coat, mane, and outfit.
2 /
2
--
Reflecting Pool
Land
{T}: Add one mana of any type that a land you control could produce.
--
Rupture Spire
Land
Rupture Spire enters the battlefield tapped.
When Rupture Spire enters the battlefield, sacrifice it unless you pay {1}.
{T}: Add one mana of any color.
{2}{W}
Sacred Mesa
Enchantment
At the beginning of your upkeep, sacrifice Sacred Mesa unless you sacrifice a Pegasus.
{1}{W}: Create a 1/1 white Pegasus creature token with flying.
{4}
Sarevok's Tome
Artifact
When Sarevok's Tome enters the battlefield, you take the initiative.
{T}: Add {C}. If you have the initiative, add {C}{C} instead.
{3}, {T}: Exile cards from the top of your library until you exile a nonland card. You may cast that card without paying its mana cost. Activate only if you've completed a dungeon.
{1}{U}
Search for Azcanta
Legendary Enchantment
At the beginning of your upkeep, surveil 1. Then if you have seven or more cards in your graveyard, you may transform Search for Azcanta. (Look at the top card of your library. You may put that card into your graveyard.)
--
Azcanta, the Sunken Ruin
Legendary Land
(Transforms from Search for Azcanta.)
{T}: Add {U}.
{2}{U}, {T}: Look at the top four cards of your library. You may reveal a noncreature, nonland card from among them and put it into your hand. Put the rest on the bottom of your library in any order.
--
Secluded Courtyard
Land
As Secluded Courtyard 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 or activate an ability of a creature source of the chosen type.
{1}
Sol Ring
Artifact
{T}: Add {C}{C}.
{2}
Spell Satchel
Artifact
Magecraft -- Whenever you cast or copy an instant or sorcery spell, put a book counter on Spell Satchel.
{T}, Remove a book counter from Spell Satchel: Add {C}.
{3}, {T}, Remove three book counters from Spell Satchel: Draw a card.
{0}
Spellbook
Artifact
You have no maximum hand size.
{1}{W}
Spellbook Vendor
Creature - Human Peasant
Vigilance
At the beginning of combat on your turn, you may pay {1}. When you do, create a Sorcerer Role token attached to target creature you control. (If you control another Role on it, put that one into the graveyard. Enchanted creature gets +1/+1 and has "Whenever this creature attacks, scry 1.")
2 /
2
{2}{W}
Starnheim Courser
Creature - Pegasus
Flying
Artifact and enchantment spells you cast cost {1} less to cast.
2 /
2
{8}{W}{W}
Storm Herd
Sorcery
Create X 1/1 white Pegasus creature tokens with flying, where X is your life total.
{1}{W}
Stormfront Pegasus
Creature - Pegasus
Flying
2 /
1
{1}{W}
Sungrace Pegasus
Creature - Pegasus
Flying (This creature can't be blocked except by creatures with flying or reach.)
Lifelink (Damage dealt by this creature also causes you to gain that much life.)
1 /
2
{3}{W}
Sunmane Pegasus
Creature - Pegasus
Flying
{1}{W}: Sunmane Pegasus gains vigilance and lifelink until end of turn.
2 /
3
{2}
Suspicious Bookcase
Artifact Creature - Wall
Defender
{3}, {T}: Target creature can't be blocked this turn.
0 /
4
{G}
Sylvan Tutor
Sorcery
Search your library for a creature card, reveal it, then shuffle and put that card on top.
{2}{U}
Tamiyo's Logbook
Artifact
{5}{U}, {T}: Draw a card. This ability costs {1} less to activate for each other artifact you control.
{2}{U}
Tenacious Tomeseeker
Creature - Human Knight
Bargain (You may sacrifice an artifact, enchantment, or token as you cast this spell.)
When Tenacious Tomeseeker enters the battlefield, if it was bargained, return target instant or sorcery card from your graveyard to your hand.
3 /
2
{W}{W}{W}
The Book of Exalted Deeds
Legendary Artifact
At the beginning of your end step, if you gained 3 or more life this turn, create a 3/3 white Angel creature token with flying.
{W}{W}{W}, {T}, Exile The Book of Exalted Deeds: Put an enlightened counter on target Angel. It gains "You can't lose the game and your opponents can't win the game." Activate only as a sorcery.
{1}
The Underworld Cookbook
Artifact
{T}, Discard a card: Create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this artifact: You gain 3 life.")
{4}, {T}, Sacrifice The Underworld Cookbook: Return target creature card from your graveyard to your hand.
{4}
Thran Tome
Artifact
{5}, {T}: Reveal the top three cards of your library. Target opponent chooses one of those cards. Put that card into your graveyard, then draw two cards.
{3}{U}
Tome Anima
Creature - Spirit
Tome Anima can't be blocked as long as you've drawn two or more cards this turn.
3 /
3
{2}{U}
Tome Raider
Creature - Faerie
Flying
When Tome Raider enters the battlefield, draw a card.
1 /
1
{U}
Tome Scour
Sorcery
Target player mills five cards.
{2}{R}
Tome Shredder
Creature - Wolf
Haste
{T}, Exile an instant or sorcery card from your graveyard: Put a +1/+1 counter on Tome Shredder.
2 /
2
{2}
Tome of Legends
Artifact
Tome of Legends enters the battlefield with a page counter on it.
Whenever your commander enters the battlefield or attacks, put a page counter on Tome of Legends.
{1}, {T}, Remove a page counter from Tome of Legends: Draw a card.
{5}
Tome of the Guildpact
Artifact
Whenever you cast a multicolored spell, draw a card.
{T}: Add one mana of any color.
{1}{U}{B}
Tomebound Lich
Creature - Zombie Wizard
Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
Lifelink (Damage dealt by this creature also causes you to gain that much life.)
Whenever Tomebound Lich enters the battlefield or deals combat damage to a player, draw a card, then discard a card.
1 /
3
{2}{W}
Trusted Pegasus
Creature - Pegasus
Flying (This creature can't be blocked except by creatures with flying or reach.)
Whenever Trusted Pegasus attacks, target attacking creature without flying gains flying until end of turn.
2 /
2
--
Unclaimed Territory
Land
As Unclaimed Territory 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.
{2}
Urza's Tome
Artifact
{3}, {T}: Draw a card. Then discard a card unless you exile a historic card from your graveyard. (Artifacts, legendaries, and Sagas are historic.)
{B}
Vampiric Tutor
Instant
Search your library for a card, then shuffle and put that card on top. You lose 2 life.
{2}{W}
Vryn Wingmare
Creature - Pegasus
Flying
Noncreature spells cost {1} more to cast.
2 /
1
{G}
Worldly Tutor
Instant
Search your library for a creature card, reveal it, then shuffle and put the card on top.
{W}{U}
Princess Twilight Sparkle
Legendary Creature - Alicorn
Flying
Other Alicorns, Horses, Pegasi, Ponies, and Unicorns you control get +1/+1.
{W}{U}{B}{R}{G}: If you control Applejack, Fluttershy, Pinkie Pie, Rainbow Dash, and Rarity, everypony wins the game.