This is another example of uncommon heavily printed vs heavily printed common will make you think that the uncommon is much more expensive, but not in this case where the uncommon is much cheaper
It has such a powerful effect - 3 coloured mana for free
Toss in the fact that Thalia, Guardian of Thraben already has several printings including a WMCQ Promo with unique art and I'd guess that the pricing of the different versions of Thalia, Guardian of Thraben will look much like the pricing of the different Secret Lair printings of Serum Visions with the one with the most desirable art being slightly more valuable than the rest, but the total value ending up right in the $30 or $35 range
We knew we wanted a card called Mise but every designer seemed to think Mise should do something different
You see, this spell costs one less mana to cast for each creature on the battlefield
Faith Unbroken is surprisingly good in a deck that can either recur enchantments or benefit from casting them, and even better when your commander is hard to interact with