Counter target noncreature spell. Its controller creates two Treasure tokens. (They're artifacts with "{T}, Sacrifice this artifact: Add one mana of any color.")
{2}
Arcane Signet
Artifact
{T}: Add one mana of any color in your commander's color identity.
{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
{2}{R}{R}
Atsushi, the Blazing Sky
Legendary Creature - Dragon Spirit
Flying, trample
When Atsushi, the Blazing Sky dies, choose one --
• Exile the top two cards of your library. Until the end of your next turn, you may play those cards.
• Create three Treasure tokens.
4 /
4
{5}{B}{B}
Black Dragon
Creature - Dragon
Flying
Acid Breath -- When Black Dragon enters the battlefield, target creature an opponent controls gets -3/-3 until end of turn.
4 /
4
{5}{U}{U}
Blue Dragon
Creature - Dragon
Flying
Lightning Breath -- When Blue Dragon enters the battlefield, until your next turn, target creature an opponent controls gets -3/-0, up to one other target creature gets -2/-0, and up to one other target creature gets -1/-0.
5 /
5
{2}{R}
Chaos Warp
Instant
The owner of target permanent shuffles it into their library, then reveals the top card of their library. If it's a permanent card, they put it onto the battlefield.
{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.
{U}{U}
Counterspell
Instant
Counter target spell.
{U}{U}
Counterspell
Instant
Counter target spell.
{3}{R}
Crucible of Fire
Enchantment
Dragon creatures you control get +3/+3.
{3}{B}{B}
Crux of Fate
Sorcery
Choose one --
• Destroy all Dragon creatures.
• Destroy all non-Dragon creatures.
{2}{R}{R}{ // }{2}{B}
Decadent Dragon // Expensive Taste
Creature - Dragon // Instant - Adventure
Flying, trample
Whenever Decadent Dragon attacks, create a Treasure token.
Exile the top two cards of target opponent's library face down. You may look at and play those cards for as long as they remain exiled.
4 /
4
{W}{U}
Dovin's Veto
Instant
This spell can't be countered.
Counter target noncreature spell.
{3}{G}
Draconic Muralists
Creature - Dragon Bard
When Draconic Muralists dies, you may search your library for a Dragon card, reveal it, put it into your hand, then shuffle.
4 /
3
{1}{R}
Dragon Tempest
Enchantment
Whenever a creature with flying enters the battlefield under your control, it gains haste until end of turn.
Whenever a Dragon enters the battlefield under your control, it deals X damage to any target, where X is the number of Dragons you control.
{1}{R}
Dragon's Fire
Instant
As an additional cost to cast this spell, you may reveal a Dragon card from your hand or choose a Dragon you control.
Dragon's Fire deals 3 damage to target creature or planeswalker. If you revealed a Dragon card or chose a Dragon as you cast this spell, Dragon's Fire deals damage equal to the power of that card or creature instead.
{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.
{1}{U}
Dragonborn Looter
Creature - Dragon Rogue
{1}, {T}: Draw a card, then discard a card.
1 /
2
{1}{R}
Dragonlord's Servant
Creature - Goblin Shaman
Dragon spells you cast cost {1} less to cast.
1 /
3
{1}{R}{R}
Dragonspeaker Shaman
Creature - Human Barbarian Shaman
Dragon spells you cast cost {2} less to cast.
2 /
2
{1}{G}{G}
Esika, God of the Tree
Legendary Creature - God
Vigilance
{T}: Add one mana of any color.
Other legendary creatures you control have vigilance and "{T}: Add one mana of any color."
1 /
4
--
The Prismatic Bridge
Legendary Enchantment
At the beginning of your upkeep, reveal cards from the top of your library until you reveal a creature or planeswalker card. Put that card onto the battlefield and the rest on the bottom of your library in a random order.
1 /
4
--
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.
{1}{G}
Farseek
Sorcery
Search your library for a Plains, Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle.
{3}
Fist of Suns
Artifact
You may pay {W}{U}{B}{R}{G} rather than pay the mana cost for spells that you cast.
{4}{R}{R}
Flameblast Dragon
Creature - Dragon
Flying
Whenever Flameblast Dragon attacks, you may pay {X}{R}. If you do, Flameblast Dragon deals X damage to any target.
5 /
5
--
Forest
Basic Land - Forest
({T}: Add {G}.)
--
Forest
Basic Land - Forest
({T}: Add {G}.)
--
Forest
Basic Land - Forest
({T}: Add {G}.)
{5}
Gilded Lotus
Artifact
{T}: Add three mana of any one color.
{1}{B}
Go for the Throat
Instant
Destroy target nonartifact creature.
{4}{G}{G}
Green Dragon
Creature - Dragon
Flying
Poison Breath -- When Green Dragon enters the battlefield, until end of turn, whenever a creature an opponent controls is dealt damage, destroy it.
4 /
4
--
Gruul Guildgate
Land - Gate
Gruul Guildgate enters the battlefield tapped.
{T}: Add {R} or {G}.
--
Haven of the Spirit Dragon
Land
{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast a Dragon creature spell.
{2}, {T}, Sacrifice Haven of the Spirit Dragon: Return target Dragon creature card or Ugin planeswalker card from your graveyard to your hand.
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Izzet Guildgate
Land - Gate
Izzet Guildgate enters the battlefield tapped.
{T}: Add {U} or {R}.
{2}{G}
Jade Orb of Dragonkind
Artifact
{T}: Add {G}. When you spend this mana to cast a Dragon creature spell, it enters the battlefield with an additional +1/+1 counter on it and gains hexproof until your next turn. (It can't be the target of spells or abilities your opponents control.)
{G}{U}
Korlessa, Scale Singer
Legendary Creature - Dragon Bard
You may look at the top card of your library any time.
You may cast Dragon spells from the top of your library.
1 /
4
{2}
Lightning Greaves
Artifact - Equipment
Equipped creature has haste and shroud. (It can't be the target of spells or abilities.)
Equip {0}
{3}{U}{R}
Lozhan, Dragons' Legacy
Legendary Creature - Dragon Shaman
Flying
Whenever you cast an Adventure or Dragon spell, Lozhan, Dragons' Legacy deals damage equal to that spell's mana value to any target that isn't a commander.
4 /
2
{3}{G}{U}{R}
Miirym, Sentinel Wyrm
Legendary Creature - Dragon Spirit
Flying, ward {2}
Whenever another nontoken Dragon enters the battlefield under your control, create a token that's a copy of it, except the token isn't legendary.
6 /
6
{R}
Minion of the Mighty
Creature - Kobold
Menace
Pack tactics -- Whenever Minion of the Mighty attacks, if you attacked with creatures with total power 6 or greater this combat, you may put a Dragon creature card from your hand onto the battlefield tapped and attacking.
0 /
1
--
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}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
{1}{U}{B}{R}
Nicol Bolas, the Ravager
Legendary Creature - Elder Dragon
Flying
When Nicol Bolas, the Ravager enters the battlefield, each opponent discards a card.
{4}{U}{B}{R}: Exile Nicol Bolas, the Ravager, then return him to the battlefield transformed under his owner's control. Activate only as a sorcery.
4 /
4
--
Nicol Bolas, the Arisen
Legendary Planeswalker - Bolas
+2: Draw two cards.
-3: Nicol Bolas, the Arisen deals 10 damage to target creature or planeswalker.
-4: Put target creature or planeswalker card from a graveyard onto the battlefield under your control.
-12: Exile all but the bottom card of target player's library.
4 /
4
{U}{U}{U}{R}{R}{R}
Niv-Mizzet, Parun
Legendary Creature - Dragon Wizard
This spell can't be countered.
Flying
Whenever you draw a card, Niv-Mizzet, Parun deals 1 damage to any target.
Whenever a player casts an instant or sorcery spell, you draw a card.
5 /
5
--
Path of Ancestry
Land
Path of Ancestry enters 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.)
{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}.)
--
Plains
Basic Land - Plains
({T}: Add {W}.)
--
Plains
Basic Land - Plains
({T}: Add {W}.)
{4}
Quicksilver Amulet
Artifact
{4}, {T}: You may put a creature card from your hand onto the battlefield.
{1}{G}
Rampant Growth
Sorcery
Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.
{4}{R}
Rapacious Dragon
Creature - Dragon
Flying
When Rapacious Dragon enters, create two Treasure tokens. (They're artifacts with "{T}, Sacrifice this artifact: Add one mana of any color.")
3 /
3
{4}{R}{R}
Red Dragon
Creature - Dragon
Flying
Fire Breath -- When Red Dragon enters the battlefield, it deals 4 damage to each opponent.
4 /
4
{4}{G}
Return of the Wildspeaker
Instant
Choose one --
• Draw cards equal to the greatest power among non-Human creatures you control.
• Non-Human creatures you control get +3/+3 until end of turn.
{3}{R}{R}
Sarkhan the Masterless
Legendary Planeswalker - Sarkhan
Whenever a creature attacks you or a planeswalker you control, each Dragon you control deals 1 damage to that creature.
+1: Until end of turn, each planeswalker you control becomes a 4/4 red Dragon creature and gains flying.
-3: Create a 4/4 red Dragon creature token with flying.
L:
5
{2}{R}
Sarkhan's Triumph
Instant
Search your library for a Dragon creature card, reveal it, put it into your hand, then shuffle.
{1}{U}{R}
Sarkhan, Soul Aflame
Legendary Creature - Human Shaman
Dragon spells you cast cost {1} less to cast.
Whenever a Dragon enters the battlefield under your control, you may have Sarkhan, Soul Aflame become a copy of it until end of turn, except its name is Sarkhan, Soul Aflame and it's legendary in addition to its other types.
2 /
4
{1}{G}
Scaled Nurturer
Creature - Dragon Druid
{T}: Add {G}. When you spend this mana to cast a Dragon creature spell, you gain 2 life.
0 /
2
{W}{U}{B}{R}{G}
Scion of the Ur-Dragon
Legendary Creature - Dragon Avatar
Flying
{2}: Search your library for a Dragon permanent card and put it into your graveyard. If you do, Scion of the Ur-Dragon becomes a copy of that card until end of turn. Then shuffle.
4 /
4
{2}{R}{R}{R}
Scourge of Valkas
Creature - Dragon
Flying
Whenever Scourge of Valkas or another Dragon enters the battlefield under your control, it deals X damage to any target, where X is the number of Dragons you control.
{R}: Scourge of Valkas gets +1/+0 until end of turn.
4 /
4
{X}{R}
Shivan Devastator
Creature - Dragon Hydra
Flying, haste
Shivan Devastator enters the battlefield with X +1/+1 counters on it.
0 /
0
{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
{2}{U}{B}
Sivitri, Dragon Master
Legendary Planeswalker - Sivitri
+1: Until your next turn, creatures can't attack you or planeswalkers you control unless their controller pays 2 life for each of those creatures.
-3: Search your library for a Dragon card, reveal it, put it into your hand, then shuffle.
-7: Destroy all non-Dragon creatures.
Sivitri, Dragon Master can be your commander.
L:
4
{1}
Sol Ring
Artifact
{T}: Add {C}{C}.
{2}{G}
Spelunking
Enchantment
When Spelunking enters the battlefield, draw a card, then you may put a land card from your hand onto the battlefield. If you put a Cave onto the battlefield this way, you gain 4 life.
Lands you control enter the battlefield untapped.
{U}{R}
Sprite Dragon
Creature - Faerie Dragon
Flying, haste
Whenever you cast a noncreature spell, put a +1/+1 counter on Sprite Dragon.
1 /
1
{U}
Stubborn Denial
Instant
Counter target noncreature spell unless its controller pays {1}.
Ferocious -- If you control a creature with power 4 or greater, counter that spell instead.
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
{W}
Swords to Plowshares
Instant
Exile target creature. Its controller gains life equal to its power.
--
Temple of Abandon
Land
Temple of Abandon enters tapped.
When Temple of Abandon enters, scry 1.
{T}: Add {R} or {G}.
--
Temple of Enlightenment
Land
Temple of Enlightenment enters tapped.
When Temple of Enlightenment enters, scry 1.
{T}: Add {W} or {U}.
--
Temple of Malice
Land
Temple of Malice enters the battlefield tapped.
When Temple of Malice enters the battlefield, scry 1.
{T}: Add {B} or {R}.
--
Temple of Mystery
Land
Temple of Mystery enters tapped.
When Temple of Mystery enters, scry 1.
{T}: Add {G} or {U}.
--
Temple of Triumph
Land
Temple of Triumph enters tapped.
When Temple of Triumph enters, scry 1.
{T}: Add {R} or {W}.
--
Temple of the Dragon Queen
Land
As Temple of the Dragon Queen enters the battlefield, you may reveal a Dragon card from your hand. Temple of the Dragon Queen enters the battlefield tapped unless you revealed a Dragon card this way or you control a Dragon.
As Temple of the Dragon Queen enters the battlefield, choose a color.
{T}: Add one mana of the chosen color.
--
Terramorphic Expanse
Land
{T}, Sacrifice Terramorphic Expanse: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
{4}{W}{U}{B}{R}{G}
The Ur-Dragon
Legendary Creature - Dragon Avatar
Eminence -- As long as The Ur-Dragon is in the command zone or on the battlefield, other Dragon spells you cast cost {1} less to cast.
Flying
Whenever one or more Dragons you control attack, draw that many cards, then you may put a permanent card from your hand onto the battlefield.
10 /
10
{3}
Urza's Incubator
Artifact
As Urza's Incubator enters the battlefield, choose a creature type.
Creature spells of the chosen type cost {2} less to cast.
{4}{B}{R}
Wake the Dragon
Sorcery
Create a 6/6 black and red Dragon creature token with flying, menace, and "Whenever this creature deals combat damage to a player, gain control of target artifact that player controls."
Flashback {6}{B}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)
{4}{W}{W}
White Dragon
Creature - Dragon
Flying
Cold Breath -- When White Dragon enters the battlefield, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.
4 /
4
{2}{W}{W}
Wrath of God
Sorcery
Destroy all creatures. They can't be regenerated.
{3}{R}{R}
Wrathful Red Dragon
Creature - Dragon
Flying
Whenever a Dragon you control is dealt damage, it deals that much damage to any target that isn't a Dragon.
5 /
5
{4}{U}{ // }{1}{U}
Young Blue Dragon // Sand Augury
Creature - Dragon // Sorcery - Adventure
Flying
Scry 1, then draw a card. (Then exile this card. You may cast the creature later from exile.)
3 /
3
{3}{R}{ // }{1}{R}
Young Red Dragon // Bathe in Gold
Creature - Dragon // Instant - Adventure
Flying
Young Red Dragon can't block.
Create a Treasure token. (Then exile this card. You may cast the creature later from exile.)