The Touma x Hamill Secret Release is a small-run piece that will be available at Designer Con 2015 in very limited quantities. This collaborative figure will be available to pick up (possibly) at the 3DRetro Booth (#532). Unlike other collaborations, this one is split down the middle - Touma did the right and Nathan Hamill did the left. Apparently, only the white version will be available. Here's hoping that they make some painted colorways.
