Commander creatures you own have "The first Dragon spell you cast each turn costs {2} less to cast."

Flying

Whenever Balefire Dragon deals combat damage to a player, it deals that much damage to each creature that player controls.

Flying

Whenever Catacomb Dragon becomes blocked by a nonartifact, non-Dragon creature, that creature gets -X/-0 until end of turn, where X is half the creature's power, rounded down.

You may play lands from your graveyard.

{T}: Choose target nonland permanent card in your graveyard. If you haven't cast a spell this turn, you may cast that card. If you do, you can't cast additional spells this turn. Activate only as a sorcery.

As an additional cost to cast this spell, sacrifice a land.

Search your library for a land card, put that card onto the battlefield, then shuffle.

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."

Defender

When Dragon Egg dies, create a 2/2 red Dragon creature token with flying and "{R}: This creature gets +1/+0 until end of turn."

Flying

{R}: Dragon Hatchling gets +1/+0 until end of turn.

Dragon's Presence deals 5 damage to target attacking or blocking creature.

At the beginning of your upkeep, if you control six or more lands, create a 5/5 red Dragon creature token with flying.

Return target creature card from your graveyard to the battlefield. If it's a Dragon, put two +1/+1 counters on it.

Commander creatures you own have "Whenever one or more nontoken creatures you control deal combat damage to a player, you create a 1/1 blue Faerie Dragon creature token with flying."

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.

Flying

Poison Breath -- When Green Dragon enters the battlefield, until end of turn, whenever a creature an opponent controls is dealt damage, destroy it.

Flying

Iymrith, Desert Doom has ward {4} as long as it's untapped.

Whenever Iymrith deals combat damage to a player, draw a card. Then if you have fewer than three cards in hand, draw cards equal to the difference.

Flying

Whenever Kaalia of the Vast attacks an opponent, you may put an Angel, Demon, or Dragon creature card from your hand onto the battlefield tapped and attacking that opponent.

Flying, vigilance

When Kaalia, Zenith Seeker enters the battlefield, look at the top six cards of your library. You may reveal an Angel card, a Demon card, and/or a Dragon card from among them and put them into your hand. Put the rest on the bottom of your library in a random order.

Flying

Whenever Mindscour Dragon deals combat damage to an opponent, target player mills four cards.

+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.

Search your library for a Plains, Island, Swamp, Mountain, or Forest card and put that card onto the battlefield. Then shuffle.

(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."

Flying

As long as Wardscale Dragon is attacking, defending player can't cast spells.

Flying, haste

Zurgo and Ojutai has hexproof as long as it entered the battlefield this turn.

Whenever one or more Dragons you control deal combat damage to a player or battle, look at the top three cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order. You may return one of those Dragons to its owner's hand.