None of the pages she's skimmed yet mention Summoned Heroes at all!  If she looks for the parts of the crafting books that are about research and invention:

Upper Tier-3 research crafters will build complicated laboratories and acquire a zillion different affinity mats that they can carve with microscopically exacting precision and do particular enchantments and spellforms for the first time, and a second time, and a hundredth time.  Then they build a version that can be carried into a dungeon and used in combat, or compete in a competition with a huge prize on the line.  In time crafters who aren't upper-Tier-3 researchers will be able to smaller less expensive (but still pretty costly and elaborate) versions.

If it's popular enough, it'll eventually become much simpler and cheaper.

The people of Kekaro are not actually stupid!  But they don't have the entire concept of spellsilver and can't just impress a hundred tiny fine exact mana-behavior-affecting properties into bits of an item.  They have to do everything via affinity mats with exactly the right shapes, mated together into larger wholes.  They can do subtractive manufacturing on affinity mats in-place by their wills, introduce carefully curved borders between affinity-mana that's there or not-there, compress it, texture it, within a single mat.  But in local crafting, you can't just take a magic item you're working on, and a smidge of spellsilver, and add in a little pull right there.

There's ways to make affinity mats that aren't from dungeons, but except in some special known easier cases they involve going to lengths like "leave some adamantine in a volcano crater, bathed in Fire mana, for a month".  It's not something you can poke into a magic item in progress.  Well, unless you're a Creation mage, but then most of the rules don't apply to you anyways.  (The particular crafting books she's skimming says this, but doesn't go into detail on how Creation magic works.)

None of the pages she's skimmed yet mention Summoned Heroes at all!  If she looks for the parts of the crafting books that are about research and invention:

Upper Tier-3 research crafters will build complicated laboratories and acquire a zillion different affinity mats that they can carve with microscopically exacting precision and do particular enchantments and spellforms for the first time, and a second time, and a hundredth time.  Then they build a version that can be carried into a dungeon and used in combat, or compete in a competition with a huge prize on the line.  In time crafters who aren't upper-Tier-3 researchers will be able to build smaller less expensive (but still pretty costly and elaborate) versions.

If an item is popular enough despite being expensive, or enough time passes with enough cumulative sales volume, it'll eventually become much simpler and cheaper to make an item that's good-enough-to-work.

The people of Kekaro are not actually stupid!  But they don't have the entire concept of spellsilver and can't just impress a hundred tiny fine exact mana-behavior-affecting properties into bits of an item.  They have to do everything via affinity mats with exactly the right shapes, mated together into larger wholes.  They can do subtractive manufacturing on affinity mats in-place by their wills, introduce carefully curved borders between affinity-mana that's there or not-there, compress it, texture it, within a single mat.  But in local crafting, you can't just take a magic item you're working on, and a smidge of spellsilver, and add in a little pull right there.

There's ways to make affinity mats that aren't from dungeons, but except in some special known easier cases they involve going to lengths like "leave some adamantine in a volcano crater, bathed in Fire mana, for a month".  It's not something you can poke into a magic item in progress.  Well, unless you're a Creation mage, but then most of the rules don't apply to you anyways.  (The particular crafting books she's skimming says this, but doesn't go into detail on how Creation magic works.)

None of the pages she's skimmed yet mention Summoned Heroes at all!  If she looks for the parts of the crafting books that are about research and invention:

Upper Tier-3 research crafters will build complicated laboratories and acquire a zillion different affinity mats that they can carve with microscopically exacting precision to do enchantments and spellforms for the first time, and a second time, and a hundredth time.  Then they build a version that can be carried into a dungeon and used in combat, or compete in a competition with a huge prize on the line.  In time crafters who aren't upper-Tier-3 researchers will be able to build smaller less expensive (but still pretty costly and elaborate) versions.

If an item is popular enough despite being expensive, or enough time passes with enough cumulative sales volume, it'll eventually become much simpler and cheaper to make an item that's good-enough-to-work.

The people of Kekaro are not actually stupid!  But they don't have the entire concept of spellsilver and can't just impress a hundred tiny fine exact mana-behavior-affecting properties into bits of an item.  They have to do everything via affinity mats with exactly the right shapes, mated together into larger wholes.  They can do subtractive manufacturing on affinity mats in-place by their wills, introduce carefully curved borders between affinity-mana that's there or not-there, compress it, texture it, within a single mat.  But in local crafting, you can't just take a magic item you're working on, and a smidge of spellsilver, and add in a little pull right there.

There's ways to make affinity mats that aren't from dungeons, but except in some special known easier cases they involve going to lengths like "leave some adamantine in a volcano crater, bathed in Fire mana, for a month".  It's not something you can poke into a magic item in progress.  Well, unless you're a Creation mage, but then most of the rules don't apply to you anyways.  (The particular crafting books she's skimming says this, but doesn't go into detail on how Creation magic works.)

None of the pages she's skimmed yet mention Summoned Heroes at all!  If she looks for the parts of the crafting books that are about research and invention:

Upper Tier-3 research crafters will build complicated laboratories and acquire a zillion different affinity mats that they can carve with microscopically exacting precision to do enchantments and spellforms for the first time, and a second time, and a hundredth time.  Then they build a version that can be carried into a dungeon and used in combat, or compete in a competition with a huge prize on the line.  In time crafters who aren't upper-Tier-3 researchers will be able to build smaller less expensive (but still pretty costly and elaborate) versions.

If an item is popular enough despite being expensive, or enough time passes with enough cumulative sales volume, it'll eventually become much simpler and cheaper to make an item that's good-enough-to-work.

The people of Kekaro are not actually stupid!  But they don't have the entire concept of spellsilver and can't just impress a hundred tiny fine exact mana-behavior-affecting properties into bits of an item.  They have to do everything via affinity mats with exactly the right shapes, mated together into larger wholes.  They can do subtractive manufacturing on affinity mats in-place by their wills, introduce carefully curved borders between affinity-mana that's there or not-there, compress it, texture it, within a single mat.  But in local crafting, you can't just take a magic item you're working on, and a smidge of spellsilver, and add in a little pull right there.

There's ways to make affinity mats that aren't from dungeons, but except in some special known easier cases they involve going to lengths like "leave some adamantine in a volcano crater, bathed in Fire mana, for a month".  It's not something you can poke into a magic item in progress.  Well, unless you're a Creation mage, but then most of the rules don't apply to you anyways.  (The particular crafting book she's skimming says this, but doesn't go into detail on how Creation magic works.)