Esta is starting to see why a primordial inevitable would enclose dath ilan in a planet-sized antimagic field, or throw their planet into a dead magic plane. If such a place actually exists and they are not just culturally very very very overconfident.
The other half of his mind is trying to explain spellsilver. Dense metal, a seventh part lighter than iron perhaps once refined, tarnishes in air so rapidly that it will turn into ash within hours or days unless you keep it immersed in oil, very expensively purified with strong acids from a yellow-brownish sand found on seashores.