Heimdall's sword Hofund is reported as "made by the Dwarf smiths of Nidavellir". It seems like it is also the "Thanos-killing kind". I was wondering why Thor didn't use it against Thanos (instead of the long process of forging a new weapon), but the link says:
After having escaped Asgard's destruction, Hofund was physically broken during the subsequent massacre by Thanos.
I don't recall seeing this, so maybe someone can help pinpoint what this is referring to.
What happened to Heimdall's sword?