Petricite Priosoner (requires that the character is able to cast spells)

You have been held prisoner in one of the demacian prisons to contain mages. Through luck or skill though, you managed to escape, however the petricite treatment the demacians inflicted on to you still pulses through your veins, and you're never quite sure when it'll effect you again.

Skill Proficiencies Arcana, Sleight of Hand

Tool Proficiencies Thieve's Tools

Languages Common, plus two more

Equipment A set of manacles or a iron chain (10 ft,) used to secure you, dark inconspicuous clothing and a pouch containing 10 gp.+

Features

Petricite Burst: Whenever you cast a spell, the petricite treatment might cause a petricite burst. If you cast a spell of first level or higher roll a d10, on a roll of 1 magical energy bursts from your Hands, forcing any creature withing 15ft to make a dexterity saving throw equal to your spell save dc+2 or take force damage equal to 2d6 times the level of the spell you cast.