its about a boy who lives on a desert planet and is taken to rescue a princess on a space
station his mentor gets killed and he destroyed the space station with a magic power
and they confront a robot black suited lord of somthing. can anyone help me?
Sounds like Star Wars to me. But then again numerous knock-offs were made in the 80s. You might have seen Space Raiders, Battle Beyond the Stars, Starcrash, or The Humanoid.
Star Wars: Luke Skywalker, on the desert planet whateverthehellitwascalled, is put in charge of two droids his uncle bought from the Jawas, a gang of cloaked dwarves that roam the desert in a mobile chop-shop, but when he's cleaning R2D2 he triggars a message- "Help me Obi Wan!"- and ends up leaving planet whateverthehellitwascalled with "Old Ben", who becomes his mentor in the ways of the Jedi. Aboard the Millenium Falcon, this being the ship they hire to take them away from planet whateverthehellitwascalled, Ben teaches Luke how to skillfully manipulate his lightsaber with his eyes closed. Now the Falcon is captained by a grumpy dude called Han Solo and his shagfoot friend Chewbacca. No sooner do they go to the planet where the girl in the "Help me Obi Wan!" message askes them to go than, WHAM, they're snared in a tractor beam and taken aboard a moon sized space station whereupon they end up rescuing Princess Leia. And the space station? Well that was called the Death Star, and you know if they give something a name in a movie that means it's a major character, so they, of course, have to come back to destroy it. All while being menanced by the forces of the Empire as led by this guy wearing a black S&M outfit and a samurai helmet called Darth Vader, who is a Lord of the Sith.
Two sequels followed and three prequels, but the less said about the prequels the better.
Ring any bells?