10 Most Powerful Items In The Marvel Cinematic Universe
6. Hofund
How many items in the MCU are able to transport people across star systems? That's exactly the function of Heimdall's sword Hofund, which is essentially the key to the Bifrost Bridge for when people wish to travel across the Nine Realms.
During the Battle of Asgard in Thor: The Dark World, Heimdall also used the sword to initiate a shield perimeter around Asgard, again proving its insane level of power without even considering it as a straight-up, conventional weapon (where it proved useful against the Frost Giants in the original movie).
It's not as flashy as a lot of the big weapons in the MCU, but it's super-cool and allows (or at least, allowed, with Thor: Ragnarok changing things there) the travel possibilities that other superheroes could only dream of. Even without the Bifrost Bridge to operate, it's still a hell of a sword.