Assemble your favorite heroes establish your army collect cool characters and build whole worlds populated by Micro Action Figures by Mega Bloks! Every mystery pack is a fun surprise thats an exciting way to get new micro action figures into your Mega Bloks collections. Inside each pack is a completely random micro action figure for you to enjoy with new themes outfits and even weapons that you cant find anywhere else. Some brands like Halo have common to ultra rare characters that will add a whole new level of collectability to your sets and make you the envy of all your friends!