Prime RID/Arms Micron. Bought AM-12 Breakdown back in July on a whim while waiting for a flight at an airport overseas. Loved it. Avoided the rest of the line but got hooked again when Silas Breakdown and Nemesis Prime were released. Ended up getting the TRU Japan exclusive Battle Shield Prime too. For a line I was avoiding, I've now got four figures with only two unique molds. Damn. The Breakdown mold just looks plain awesome and I love transforming the RID/AM Optimus mold.