I use to run four copies of Blinkmoth Nexus but I ran into problems where I would need another blue mana in the early game. I fine things work out fine with the Mishra Factories once control of the board can be maintained. I often times do not even get my opponents to zero life points; most opponents concede once they figure out how the rest of the game is going to play out for them. Additionally, the deck has alternate defenses and win conditions.
Permalink
Of course I could always just add Dismember.
I have not thought of that as I have yet to encounter an Obliterator while playing this deck. My first thought was Grab the Reins but it is a little pricey when attempting to pull it off with its entwine cost. So option two would be an artifact; I would say go for Pit Trap. Pit Trap is cheap at two mana to cast and two for its activation.
If your question is about how do I expect to get a hold of one, my answer would be I have owned one for years.
Any suggestions for improving the deck are appreciated. Strip Mine is in there only until I get my hands on a Mox Ruby.