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Shape Anew and Inkmoth Nexus, Argent Mutation, or Myr Token for Blightsteel Colossus, sure why not.
The goal is to remain stable until about turn 5, wherein you should either have an Inkmoth and 4 other land ready to shape anew. Or be recieving a Myr token for forcing a sac from your opponent via Parasitic Implant on turn 4.
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I've considered white/blue instead of Black/Blue, Master's Call and Phyrexian Rebirth are both very strong plays, Master's Call allows for turn 4 Shape Anew.