You are losing two life every upkeep
Cards like Crushing Canopy, Return to Nature, or the charms can be seen as two or three different cards in one
The characteristics of the door that wasn't cast are still ignored while the copy is on the stack, and when the copy resolves, the token it becomes will enter with the appropriate door unlocked
One of the bigger new reveals to come out of the livestream is the confirmation of a totally new mechanic called "Vivid," which has you count the colors among your permanents for some kind of scaling effect
A Lagomos deck will include plenty of board wipes, plenty of edict effects and creatures like Plaguecrafter, and haste enablers like Anger or Swiftfoot Boots
For more high tier decks, have a look at our Tier List for more suggestions, and tell us how successful you are with Dragonite!