You mean like the Holy Grail, it doesn’t actually do much except send knights on quests, starts wars, sacks cities, etc.
Seems like a really powerful Artifact of Evil if you ask me. Remind me not to drink from it, even though it was filled with blood at one point, so would otherwise be tasty.
I don’t remember the movie you speak of, I don’t get to see too many movies, I don’t get to Earth very often.
However, I was on the one plane of existence ran by robots, who needed my assistance in ridding themselves of these human vermin, so I helped them program these time traveling killer robots that coincidentally, they called Terminators.