Even without the exhaust effect, being able to make all opponents mill two cards is nice
Were going to have great mana, great cards, and a brand new format to explore, and it should be a lot of fun
If it was Moltres I would have bought it Moltres Gold Label with 9.5, 10, 10, 10 recently sold (which I unfortunately lost)
Not all you have to do is wait three turns (or less if you can keep the Doctor around to activate his ability) and you can resolve your spell for free
It comes in at only two mana but can become a copy of any creature you own, assuming you exile it, so while they are only two mana, you generally want to wait to cast them until you have something big in play, like Massacre Wurm or Crabomination