Others, such as the Beach Troopers, are for comical effect. Appearing only briefly in Lego Star Wars II: The Original Trilogy, they are clad in a Speedo and stormtrooper helmet. In Lego Star Wars: The Complete Saga, they also wear life jackets. A distinct variant known as "Shadowtroopers" appear in Star Wars Jedi Knight II: Jedi Outcast, wearing black armour that incorporates a lightsaber-resistant mineral called cortosis. As a project of the Dark Jedi named Desann aligned with a Remnant of the Empire, the Shadowtroopers themselves had been immersed in a Force nexus on Ruusan, temporarily empowering them with Force sensitivity. This armour has a green synthetic gem set into the breastplate which sustained the otherwise temporary effect of their Force empowerment and combines with their abilities to render them near-invisible, with only a faint area of blue discoloration giving them away. In conjunction with their Force-granted telekinesis, reflexes, and agility, the Shadowtroopers are armed and trained in the use of mass-produced red lightsabers. Their combination of abilities allow them to lie in wait and ambush the enemy, representing formidable opponents even for trained Jedi, most often the game's Jedi protagonist, Kyle Katarn. Shadow stormtroopers appear in Star Wars: The Force Unleashed and wear exactly the same type of Phase III armor[clarification as normal stormtroopers but not white in color, but rather a mixture of silver, grey and red detailing. These troopers also possess the invisible feature and use this tactic to ambush their enemies, but only if stormtrooper officers call out for support.