Surge of Malevolence

Mild taint,

Once per day, you can add a bonus on any single attack roll, saving throw, or check. You must make the decision to add the bonus before you roll the die. The amount that you add varies, based on your corruption. If you have mild corruption, then the bonus is equal to +3. If you have moderate corruption, then the bonus is equal to +6. If you have severe corruption, then the bonus is equal to +9.

You empower yourself by drawing on the taint within.