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In a control deck it is a decent tempo card as the life is significant but in the agro decks the simple Incinerate is so much more forgiving on your mana and does exactly the same thing, if not more, for you
Major, rare errors can sell for much more than the normal card
Even without a deck full of snow permanents, just playing the best ones and untapping your lands is still more than enough
Tuktuk Rubblefort With the small inconvenience that it's not colorless and it costs 1 extra mana, Tuktuk Rubblefort is a better version of Crashing Drawbridge as you dont need to wait a turn to give your other creatures haste
Herigast, Erupting Nullkite Marcy: I think this might be one of the better Emerge cards, especially since it gives everything else Emerge too