Your natural aptitude coupled with years of dedicated training has made you an unparalleled master in your signature discipline. Select one skill or type of equipment (tools, kits, sets, instruments, vehicles, etc.) that can require ability checks. You receive the following benefits:

• You gain proficiency in your chosen skill or equipment if you don't already have it. Your proficiency bonus is doubled for any ability check that uses this skill or equipment.
• You gain a +5 bonus to your 'passive' score for this skill or equipment, if applicable.
• Whenever you make an ability check using this skill or equipment, you can treat a d20 roll of 9 or lower as a 10.

You can choose this feat multiple times, but you can only apply these benefits to any single skill or type of equipment once.