Without haste, it's a little vulnerable for one turn while the summoning sickness passes, but if your opponent doesn't have a response, it's a brilliant card to have in your deck
At the moment, $20 is a fantastic price for Tiamat, but expect to pay higher
I'm not even sure it would see much play, but it's just such a well-rounded bird that I've always been fond of it
Thalia is a very good blocker, and if you put a counter on it it becomes a good attacker too, but I might keep zero in the deck post-board if they dont play Emperor in their deck since at that point the ability might handicap me too much
Fist Of Suns A lot of the Dragons in the deck have a high casting cost, multiple that cost over five mana
Using the adventure Garenbrig Growth early on in games can help to return useful lands like Boseiju, Who Endures