This creature is actually a bit modest compared to most Dragons and can't protect itself, so it may need effects like Crucible of Fire or Scion of Draco to be impactful
Filigree Racer Filigree Racer asks 2 energy for a jump-start, which is a decent deal if an energy deck in EDH is going to have spells it wants back
Lastly, the deck also has a big scary creature who is both great to bring back with reanimation and gives you a massive payoff for milling yourself
Kitesail Freebooter Kitesail Freebooter kind of redefined the genre of creatures that remove a card from the opponent's hand when they come into play
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Chapter III will make two of your creatures, including the 3/3 you got with chapter I, and maybe the creature you got with Chapter II, into very real threats