Flaws

^{Mistveil → Rules → Flaws}
Flaws are optional drawbacks that a character can choose upon character creation in order to gain an extra feat. By default the number of flaws you can select is two but your GM may want to only use one if they want to avoid PC's with too many feats to start out with. In general a flaw should be as bad as a feat is good (although that is very subjective). Flaws are being used as intended if they are custom to your character and apply a penalty that will actually be detrimental. For example, a character focusing exclusively on ranged combat should not be allowed to take a flaw that gives them a penalty on melee attack rolls. Although the character being worse at melee attacks feels thematic, the penalty will rarely hamper them in anyway and thus is not a good flaw.

Here are some examples of flaws made for PC's in the past to get a general idea of what they could look like:

Scorched Past

Sometime in your past you were marked by flame and those memories have never left you. While conjuring fire the build up of heat in your hands rekindles those memories, making it harder to finish the spell.
Whenever casting a spell, or activating a magic item that has a spell, with the fire descriptor you must make a concentration check or fail to cast the spell or use the item. If you're required to make a concentration check already, such as casting defensively, the DC is increased by 2.

Failed Experiments

Repeated exposure to chemicals, explosions, and a combination of the two have thrown off your center of gravity and left you partially deafened.
You suffer -4 to perception, -2 stealth, and -2 on acrobatics checks to balance.

Life is Precious

Your training as a physician has left you unable to turn a blind eye to the taking of another life.
After delivering the killing blow to a living humanoid of which you are aware of its sentience, you gain the sickened condition for some time. Although you’re never able to truly get over this feeling, exposure to these hard truths does eventually lessen the time it takes you to push it back in your mind. You have the condition for 10/LV minutes, rounded to the nearest minute (minimum 1 minute).

Hydrophobia

Be it a traumatic childhood experience or maybe just a deep fear of the deep, you can't stand being in water.
You suffer -2 on Swim checks and you cannot take a 10 on Swim checks. In addition, whenever you enter waist-deep water make a Will saving throw DC 13 or become Shakened until you leave the water.

Racial Photosensitivity

Many members of your race have trouble seeing in the bright light of the surface but you face another challenge as well, becoming deeply tired after extended exposure to the sun.
If you spend at least an hour in direct sunlight, you gain the fatigue condition. If you continue to be exposed to sunlight for an additional hour you gain the exhausted condition and after three hours of exposure to sunlight you fall unconscious. Resting for an hour in an area shielded by the sunlight restores the fatigued and exhausted conditions or causes you to awaken from unconsciousness (you then need an additional hour of rest to remove the exhausted condition).

Marked by Fey

Either taken as a child or whisked away after a night of revelry in the forest, you've been marked by the creatures of the Feywild and now find yourself unable to be comfortable while in contact with metal for too long.
You have the same armor restriction as the Druid class, being unable to wear any metal armor.

Broken Common

Learning new languages can be difficult for anyone but for whatever reason you could never truly grasp the complexities of the Common tongue.
You suffer -2 on Bluff checks when speaking Common, and any verbal skill skill (bluff, diplomacy, etc) counts as an automatic failure when a 1 is rolled on the d20 if speaking in Common.

Fallen Angel Cursebrand

Prerequisite: Aasimar
Despite your unknown origins one thing is clear, you have a connection to some kind of being from the Celestial Planes of Heaven. At some point though that being has succumbed to the fiendish corruption that comes with fighting Demons and has become a Devil. That fall from grace has spread to you and manifests in the form of a Cursebrand you cannot easily hide.
You suffer a -2 penalty on all saving throws effects or abilities with the Evil descriptor. Damage from those sources also overcome any energy resistance you have and treat any energy immunity as a resistance of 40 instead.

The Cursebrand must be in an easy to see place on your body and you are unable to hide it. Any attempt at a Disguise check to do so counts as an automatic failure. If it is covered with cloth or any other material a burnt symbol matching the brand will appear over it.

Anyone with ranks in either Knowledge (religion) or Knowledge (planes) will recognize what the Cursebrand is and may distrust you or avoid you because of it depending on their own beliefs. If an individual fits those criteria any Diplomacy skill check to improve their attitude towards you or any Bluff skill check to Deceive or Lie to the individual has it's DC increased by 5.

Finally any denizen of the Celestial Planes of Heaven, regardless of their skill ranks, will recognize the mark easily, likely desire to avoid you for fear of the corruption spreading to them, and will have a Starting Attitude one category lower than they normally would when first meeting you (even if this lowers their attitude from Unfriendly to Hostile, in which case they will act accordingly). Any attempt to improve their attitude with the Diplomacy skill has an increased DC of 10.

This counts as two Flaws for the purposes of how many you are able to take at character creation and bonus feats you can receive.