Once per day when you make a die roll, you can choose to reroll one die. You can choose to do so after you roll the die, but before the DM tells you whether you succeed or fail. You must take the result of the reroll, even if it's worse than the original roll.
In addition, once per day when an attack hits you, you may force an enemy to roll the attack again. The enemy must take the result of the reroll, even if it’s worse than the original roll.
You learn the prestidigitation cantrip. When you reach 3rd level, you can cast the chaos bolt spell as a 1st-level spell once with this trait, and you regain the ability to cast it this way when you finish a long rest. Charisma is your spellcasting ability for these spells.
Also, if you score a critical hit while casting the chaos bolt spell using this feature, the bolt deals damage as though it were cast as a 2nd level spell.