Pieces for the 2012 Kre-O building set number 98812, Battle for Energon, featuring Autobot Leader Optimus Prime and Decepticon Leader Megatron. With the pieces in this set, one can build both of these transformers in either their robot or vehicle modes. This set also includes one of the 7 pieces of dark energon needed to build the Quest Blaster. This set includes no kreons, no instructions, and no box, and is missing a few pieces. However, both characters can be still be built in either mode, and the pieces included are in excellent condition. Instructions are available online. From a smoke-free home. May or may not include bonus items.
Missing pieces (excluding pieces associated with kreons and their accessories):
1X Lt Gray 00076 (1X1 antenna, used for one of Optimus Prime's smokestacks)
1X Black 00038 (2X2 cone, part of Megatron's cannon)
2X Red 12923 (2X2 plate, parts for Optimus Prime, though not absolutely necessary)
According to the parts checklist in the instructions, there should be 12 Black 10259 (2X2 with clips) included as well, though one may notice only 10 are photographed. The set was able to be completed with 10, however, so it's possible this was a typo in the checklist.