Corrupted Ylbedian Mark of Sorcery

You have a corrupted Ylbedian Mark of Sorcery. Further guidance from The Mistress has granted you some control over the nature of your mark enhancing your psychic abilities  Determine its appearance and the flaw associated with it. You gain the following benefits:

• Increase your Constitution score by 1, to a maximum of 20.
• When you roll psychic damage for a spell you cast, you can reroll any roll of 1 on the psychic damage dice, but you must use the new roll, even if it is another 1.
• You know Thunderwave. Moments of extreme peril can cause you to cast this spell with of without consent to do so. When this happens, roll on the wild magic table.