Main sequence stars will burn iron and then die
Because their Nova death is, um, ordinary
It’s the best they can do.

The Giant stars have a Magic Death and
Create heavy metals, all of them
By that I mean all the Giants and all the heavy metals

The impact of a death on the rest of the universe:

Will make more carbon and iron and lesser masses
The mortar of the current stuff we live
-or-
Will create gold and iridium and titanium
Irradiating a sphere the size of a galaxy

Once again we see our dual heroes in the stars
Performing heroic impossibilities
Or making yet another asterism of fish and telescopes.