Field Expertise

This is a list of optional expertise a character may have to customize their background in a way beyond the basic backgrounds and feats.

• When starting a new character, you may choose a number of expertise from this section equal to your proficiency. You may choose only one expertise per skill.

• These should be based in narrative fit, not minmaxing.

• Additional expertise must be earned through training/studying (see below).

• You may propose unique field expertise not present in this section that fits your character background and story, at DM discretion.

• At DM discretion, you may take one expertise as a weakness (gaining disadvantage in it) in order to gain a free expertise (likely in a related area).

When you make a Skill check on a subject or field that you have Expertise in, add your Proficiency to the roll an extra time. If you are proficient or double proficient in the main skill, you are double or triple proficient in the expertise instead/as well.
Additionally, if two or more circumstances give advantage to the roll at the same time, you can make the roll at double advantage, rolling 3d20 and taking the highest result.
During downtimes, you may acquire points to learn new expertise; at DM discretion, some expertise may require extra points or a trained teacher if the expertise is complex or rare (ex: a specific Arcana lore).

• Each day of downtime where 4 or more hours are spent training, make a roll using the main skill the expertise is based on to gain training points based on the chart below.

• A person with the expertise may spend the same amount of time training you to grant you advantage on this roll.

• Once you have acquired enough points, you are now proficient in that field expertise.

• At base, a new expertise requires 200 training points if you are not proficient in the main skill or 100 if you are.

Check Benefit 0-10 No Points 10-14 1 point 15-19 2 points 20-24 3 points 25-29 5 points 30+ 8 points