Chris Taylor
Contributor
Mutavault gets the nod for me for fitting in with a million little things, and not blocking as a 3/3I have an epic fight to settle, friends.
I like that Mutavault reads so much cleaner than Factory with it's weird tap ability. I also like that Mutavault is a Goblin, that's relevant for Goblin Trashmaster and friends in the core and for a couple of random typal cards in the occasionals.
I like that Mishra's Factory is an artifact, that's nice for Arcbound Ravager, Darksteel Juggernaut and some occasionals but most artifact payoffs don't care that much, because it's only an artifact when activated.
That gets people sometimes.