For invaders of all sorts, the Invader Helmet is the headgear of choice. Whether you're a medieval warlord mounting a siege on a castle your empire wants to take control of or a sci-fi alien creature with low esteem, this custom LEGO helmet is the cranial protection you want and deserve. Plus, as Roland notes in his 5-star review, the Invader Helmet looks great with some attachments:

"This is another great helm for your mini figs and they look great with any of the available horns, although I personally think the boot wings give it an even better look"

Up, up, and away!