Adjustments

An ounce of iron, if used as a spell component, allows for one metamagic effect per the Sorcerer class rules. Each ounce is equivalent to one sorcery point. An individual may only utilize one kind of metamagic effect in their lifetime (unless they're a Sorcerer).
If there is iron not contained by another material (bone, copper, obsidian, or maithiúnas wood) within five feet of a spellcaster, the caster must succeed on a saving throw for their spellcasting ability, or consume the iron, producing one wild magic effect per ounce.

Faction Agent and Knight of the Order Backgrounds:
Their features remain largely the same, with different factions/ orders. Those can be found here. (Still a work-in-progress, just tell me if you're interested in something specific or have an idea not present, and we'll flesh it out.)