from Saturday School 2/21/4
Q: What happens when Mycosynth Lattice is in play and a player plays a Furnace Dragon?
-- Jovan Latag
A: First of all, all permanents in play will be artifacts and help reduce the cost to play the Dragon. When the Dragon comes into play, it's immediately changed into an artifact creature by the Lattice's effect, and, if you played the Dragon from your hand, the triggered ability will remove all artifacts from the game, which will be all permanents, including the Lattice and the Dragon itself.
Just dropping this post in for clarification.
It's good to see everyone is keeping up on the new interactions. I go to Saturday school just because stuff like this interaction keeps me from being able to "see" the fun combos I want to be able to play one day.