I was inclined to rate this slightly higher than Sower as she is more robust due to having persist however most of the time you want to make this guy with a mana open as tapping out to drop a 2/2 you don't want involved in much combat and therefore doesn't offer much tempo can be very risky, it can easily lead to them untapping and getting out the card they were holding back for fear of other counters
While those cards reward you for equipping creatures, this makes the equipment themselves generate additional card advantage
Should I Grade a Serialized Card
Really, my favorite format was fine without it
Number 186 Language English Not Legal Formats Alchemy, Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pauper, Pioneer, Standard, Timeless, Vintage Rulings (1/19/2018) Contraptions are artifacts