Boon of the Sinner

You understand how to take advantage of a creature's resistances and weaknesses to their fullest extent. Whenever you damage an enemy with vulnerability, or immunity to your damage, you gain 2 Affinity, when you damage an enemy with resistance to your damage you gain 1 Affinity. You can only gain up to 2 Affinity per attack at most, and you can only hold up to 8 Affinity. Affinity disappears after a battle. You may use Affinity for the following abilities:

- Spending 2 Affinity as a Bonus Action, you may choose a creature within 60 ft. of you and remove two of their resistances until the end of your next turn.

- Spending 5 Affinity as a Bonus Action, you may choose a creature within 60 ft. of you, they lose invulnerability to a damage of your choice and instead gain resistance to the chosen damage type until the end of your next turn. You cannot use this boon to remove the resistance granted by this bonus action.

- Spending 8 Affinity when you hit a creature, if you deal damage that the creature is vulnerable to, you double your vulnerability damage. (2x2.. etc.)

- Spending 8 Affinity as a bonus action, you may choose a creature within 60 ft. of you to be vulnerable to a damage type for the next source of damage it receives.