提案/Suggestion
A resource, that is used to further upgrade weapons and armor.
It would increase a skill on equipment or for simplicity add a Driftstone slot to the equipment.
Balance: You can only get the resource from 10 star monsters.
The equipment will need to be upgraded to grade 10 before you can upgrade with the resource.
You will need multiple of the resources to preform the upgrade.
Edit: Fixing spelling mistakes and simplifying the suggestion.
現状/Current Status
This is an idea to solve 3 things.
Incentive to hunt 10 star monsters,
Incentive to upgrade armor past grade 8,
Reward for getting weapons to grade 10, like what was done with Brute Tigrex weapons.