Im happy that the first thing that Im doing at CommandFest Orlando is drafting with March of the Machine
The biggest issue with this card is its considerably circumstantial, so while its pretty good, it wont always be the most useful card to have in hand
Its seen some play in Constructed formats, and its a good value creature, but nothing special
They have a little give to them, meaning that picking up cards is easier than off a flat table
A Dimir deck with a lot of draw/discard would find this little guy a great fit, and I think you could argue that the ability to exile things you can't or don't plan on getting back is worth it to get a card (assuming flying gets you over blockers)
First, you play your Room cards, then sacrifice them to whittle down your opponent's life total