Ultimate Improviser Feat

You find new ways to do anything. When you craft an item, you gain the following benefits:

Prerequisite: None

• Increase one ability score of your choice by 1, to a maximum of 20.
• You can improvise a replacement for any material that costs a number of gold pieces less than or equal to your character level. This ability doesn't create matter out of nothing, it simply assumes you can create the item with materials at hand or adapt simple components to your needs. If no materials at all are available, the item can't be created. A consumable item created with an improvised ingredient lasts only 24 hours before breaking.
• You can apply half your proficiency bonus (rounded up) to any check you make with tools.

Source: KCCC, page 125