system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] How powerful is Heimdall ?

Now i know he defeated half power Thor when using his sword Hofund, and i'm pretty sure i fucked its name,
I know he is same class as Baldur, Tyr  and prime Volstagg,and above Hogun, Fandrall, Sif and Valkirye. 
He has extremely sharp senses.
He is extremely brave, charging at both Destroyer and Hulk, and i'm pretty sure his reputation is only bellow Thor and Odin.
I mean he was a temporary king of Asgard.
And that's about it. 
Now if you have knowledge about him, feats, statemans and so on, by all means enlighten me.
gpt
In a general sense of Heimdall from Norse religion, Helmdall is pretty damn powerful. He can see past Loki's tricks, has control over movement between realms, is deeply trusted by Odin and is a valiant fighter.

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In Marvel, Hofund can wield cosmic power. It can literally take strength from a star and energize itself. It's a sword of magic that allows Heimdall many things like disguise and energy absorption. There is a SHIELD comic where a terrorist somehow came into possession of Hofund and it took a few superheroes to take him down due to how insanely powerful the sword is in general. That guy had no idea how to wield it and it still took superheroes to defeat him. Imagine what Heimdall, who knows the sword extremely well, can do with it.