Your basic strategy for this deck is toget out your big dragons and do direct damage thanks to flying.
I also avoided adding any tutor cards into the deck.
Stormbreath Dragon
Earthquake
Earthquake deals X damage to each creature without flying and each player.
Breaching Dragonstorm
Carnelian Orb of Dragonkind
Tap to add red mana.
If that mana is spent on a Dragon creature spell, it gains haste until end of turn.
Creature spells you cast cost 1 less to cast for each +1/+1 counter on Animar.
Opportunistic Dragon
Dragonspeaker Shaman
Dragon spells you cast cost 2 less to cast.
Nogi, Draco-Zealot
Maelstrom of the Spirit Dragon
Tap to add colorless mana.
Tap to add one mana of any color.
Spend this mana only to cast a Dragon spell or an Omen spell.
Migration Path
Kindred Discovery
As this enchantment enters, choose a creature jot down.
Whenever a creature you control of the chosen bang out enters or attacks, draw a card.
Although not a dragon, I think Animar, Soul of the Elements fits this deck’s strategy nicely.
Its cost-reducing ability will make it much easier to cast some of your bigger creatures.
These can be used to pressure your opponents, or as a form of targeted removal.
I likedEarthquake as an alternative to Storm’s Wrathbecause this deck runs mostly creatures with flying.
The rest of the replacements I made were simply toadd better versions of the existing cards.
That said, I think Ureni slots well into the 99 of any Miirym, Sentinel Wyrm decks.
It can copy a big threat and also give it flying for a low mana cost.