If you want to stick to that style, they can be a little trickier to upgrade, but its worth it for the pure artistry and theming on offer
Its not the most interesting card in the world, but it is a card that I think has a right to exist, and a card that fills a good niche within those niche builds, which is have a win condition that isnt just combat focused
But they can spend a Blue mana to untap them
When it's defeated, exile it, then cast it transformed.) When Invasion of Dominaria enters the battlefield, you gain 4 life and draw a card
Sazh himself can also tutor up lands and Birds, and Traveling Chocobo lets you play lands and Birds off the top of your library, and it doubles landfall triggers too
Flexibility like that is exactly what lets slower dragon decks keep up with faster, more consistent strategies