I love dragon decks!~~ <3 +1 Good job on balancing the mana symbols to land mana. I would consider putting in Coalition Relic :3. Helps me get out everything faster dragon wise.
When I playtested it, its started out being REALLY slow, but once i got the right land (Harrow is God in this deck), it was just dragon after dragon! Nice! +1
This deck moves very slow and will have a major issue with both control decks and quick drop decks. Also Sisay follows the legend rule so having four seems like overkill. Try either putting in some control aspects like counterspells and removes or adding elvish piper to help bring out the big hitters. I do like the dragon theme though. :-)