For Number 5 I would work more like this.
The caster character (Seth of Clan Hanson) is creating a custom spell, aka one that is not on the basic spells list on page 38.
That custom spell in this case would be named something like “Seth’s Lasting Enchantment”.
Seth’s Lasting Enchantment (total spell cost 6 hero points)
- Create (3 hp)
- Lasting (3 hp)
This spell allows the user to create an object imbued with any spell know by caster. This spell can be cast X times unless the caster is able to invest 15 hero points into the spell while casting. This investment makes the enchantment permanent. If the item has been invested with 15 hero points when created the spell charge can be renewed when the wielder is able to rest in a safe place.
If the caster then wanted to create a wand of Fireblast they would first need to have the Fireblast spell.
So let’s say that Seth has Fireblast with 1 additional casting and Ranged (total spell cost is 9 hero points)
Seth would cast “Seth’s Lasting Enchantment” and imbue the wand Fireblast. in this example Seth does not spend the 15 hero points to make it lasting. So the want now exists and holds 2 ranged charges of Fireblast that deal 1d6 damage. Once both charges are used the wand turns to dust.
In another example the noble knight traveling with Seth is asking to have his sword enchanted to allow it throw fire.
Seth sits down with the knight and the sword and begins to cast Seth’s Lasting Enchantment to add Fireblast to the sword. As the knight wants to the enchantment to last it will require a magical investment to be made permanent (aka someone needs to spend 15 hero points to make this lasting) the knight will provide the life force the spell requires and now when Seth completes the casting the sword gains the ability to cast 2 ranged Fireblasts at 1d6 damage before it requires recharging while resting in safety.
So in the end you aren’t spending all of the 29 points you listed every time you use this spell.
This is because Create, Lasting, and the 3 additional castings were effects that were added to spells that are only paid once.
So the caster has at minimum 2 spells to do what you want.
- Fireblast spell with 3 additional castings (cost 12 hero points) This is a spell the caster can use on it’s own no item required.
- Seth’s Lasting Enchantment (cost 6 hero points) once the spell is know there no cost to cast it unless you want to active the Lasting Effect with then has a cost of 15 hero points.
If I am the GM the only additional cost I would add would be if you wanted to enchant an item that is use able out side of the spell imbued in it. So if a sword with fireblast is also intended to be used as a sword I would rule that the create spell can’t create any form of a sword that is use able as a sword and as such a use able sword would need to be provided to the spell.