G.I.Joe FSS 3.0 13TH Mystery Figure Revealed! Author Serpentorslair Staff Date May 29, 2015 Comments: Leave a comment After what seems like waiting forever, we know now what the mystery 13th figure from the G.I.Joe FSS 3.0 is. Check out ‘Frostbite‘ below, and let us know if it is what you expected after the JUMP! (David Miller via Facebook) Tweet