When a source an opponent controls deals damage to you, sacrifice Awaken the Sky Tyrant. If you do, create a 5/5 red Dragon creature token with flying.

Breath Weapon deals 2 damage to each non-Dragon creature.

If you control two or more other lands, Cave of the Frost Dragon enters the battlefield tapped.

{T}: Add {W}.

{4}{W}: Cave of the Frost Dragon becomes a 3/4 white Dragon creature with flying until end of turn. It's still a land.

Until end of turn, target creature you control becomes a blue Dragon Illusion with base power and toughness 4/4, loses all abilities, and gains flying.

Destroy any number of target creatures. For each creature destroyed this way, its controller creates a 4/4 red Dragon creature token with flying.

Enchant creature

Enchanted creature gets +1/+1 and has flying, haste, and "{1}: This creature gets +1/+0 until end of turn." It's a Dragon in addition to its other types.

When enchanted creature dies, return Draconic Destiny to its owner's hand.

As an additional cost to cast this spell, you may reveal a Dragon card from your hand.

Draconic Roar deals 3 damage to target creature. If you revealed a Dragon card or controlled a Dragon as you cast this spell, Draconic Roar deals 3 damage to that creature's controller.

Commander creatures you own have "At the beginning of your end step, if a source you controlled dealt 5 or more damage this turn, create a 4/4 red Dragon creature token with flying."

{5}{R}{R}: Create a 5/5 red Dragon creature token with flying. (It can't be blocked except by creatures with flying or reach.)

Dragon's Approach deals 3 damage to each opponent. You may exile Dragon's Approach and four cards named Dragon's Approach from your graveyard. If you do, search your library for a Dragon creature card, put it onto the battlefield, then shuffle.

A deck can have any number of cards named Dragon's Approach.

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.

As long as you control a Dragon, Dragonloft Idol gets +1/+1 and has flying and trample.

Until end of turn, target creature you control becomes a blue and red Dragon with base power and toughness 4/4, loses all abilities, and gains flying.

Overload {3}{U}{U}{R}{R} (You may cast this spell for its overload cost. If you do, change its text by replacing all instances of "target" with "each.")

Whenever one or more creatures you control that entered the battlefield this turn deal combat damage to a player, create a 5/5 red Dragon Spirit creature token with flying.

{1}{R}: Creatures you control gain haste until end of turn.

{R}: Creatures you control gain haste until end of turn.

{3}{R}{R}: Create a 5/5 red Dragon Spirit creature token with flying. Activate only if you control an attacking modified creature. (Equipment, Auras you control, and counters are modifications.)

As long as Grand Master of Flowers has seven or more loyalty counters on him, he's a 7/7 Dragon God creature with flying and indestructible.

+1: Target creature without first strike, double strike, or vigilance can't attack or block until your next turn.

+1: Search your library and/or graveyard for a card named Monk of the Open Hand, reveal it, and put it into your hand. If you search your library this way, shuffle.

Haste

Whenever Kolaghan Warmonger attacks, look at the top six cards of your library. You may reveal a Dragon card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Other Dwarves you control get +1/+0.

Whenever a Dwarf you control becomes tapped, create a Treasure token.

Sacrifice five Treasures: Search your library for an artifact or Dragon card, put that card onto the battlefield, then shuffle.

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.

Dragon spells you cast cost {1} less to cast.

Whenever Nogi, Draco-Zealot attacks, if you control three or more Dragons, until end of turn, Nogi becomes a Dragon with base power and toughness 5/5 and gains flying.

{1}, {T}: Add two mana in any combination of colors. Spend this mana only to cast Dragon spells or activate abilities of Dragons.

{R}, {T}, Sacrifice Orb of Dragonkind: Look at the top seven cards of your library. You may reveal a Dragon card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Other Kobolds you control get +2/+2.

Whenever you cast a Kobold spell, you may pay {2}. If you do, create a 4/4 red Dragon creature token with flying.

Whenever you cast a Dragon spell, create a 0/1 red Kobold creature token named Kobolds of Kher Keep.

+1: Draw a card, then add one mana of any color.

-2: Create a 4/4 red Dragon creature token with flying.

-8: Search your library for any number of Dragon creature cards, put them onto the battlefield, then shuffle.

+1: Creatures you control get +1/+1 and gain haste until end of turn.

-2: Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn.

-6: Create five 4/4 red Dragon creature tokens with flying.

+2: Sarkhan, Dragonsoul deals 1 damage to each opponent and each creature your opponents control.

-3: Sarkhan, Dragonsoul deals 4 damage to target player or planeswalker.

-9: Search your library for any number of Dragon creature cards, put them onto the battlefield, then shuffle.

+1: You may discard a card. If you do, draw a card.

+1: Add two mana in any combination of colors. Spend this mana only to cast Dragon spells.

-7: Create four 5/5 red Dragon creature tokens with flying.

+1: Until end of turn, Sarkhan, the Dragonspeaker becomes a legendary 4/4 red Dragon creature with flying, indestructible, and haste. (He doesn't lose loyalty while he's not a planeswalker.)

-3: Sarkhan, the Dragonspeaker deals 4 damage to target creature.

-6: You get an emblem with "At the beginning of your draw step, draw two additional cards" and "At the beginning of your end step, discard your hand."

As an additional cost to cast this spell, you may reveal a Dragon card from your hand.

Scaleguard Sentinels enters the battlefield with a +1/+1 counter on it if you revealed a Dragon card or controlled a Dragon as you cast this spell.

Partner with Khorvath Brightflame (When this creature enters the battlefield, target player may put Khorvath into their hand from their library, then shuffle.)

Double strike

Dragons your team controls have double strike.

Equipped creature gets +5/+5.

{6}, Exile Tatsumasa, the Dragon's Fang: Create a 5/5 blue Dragon Spirit creature token with flying. Return Tatsumasa to the battlefield under its owner's control when that token dies.

Equip {3}

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.

Read ahead (Choose a chapter and start with that many lore counters. Add one after your draw step. Skipped chapters don't trigger. Sacrifice after III.)

I -- The Elder Dragon War deals 2 damage to each creature and each opponent.

II -- Discard any number of cards, then draw that many cards.

III -- Create a 4/4 red Dragon creature token with flying.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)

I -- Up to one target creature can't block for as long as you control There and Back Again. The Ring tempts you.

II -- Search your library for a Mountain card, put it onto the battlefield, then shuffle.

III -- Create Smaug, a legendary 6/6 red Dragon creature token with flying, haste, and "When this creature dies, create fourteen Treasure tokens."

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.)