Inverse

You invert damage taken based on a specific threshold.

Cursed Energy
Starting at 1st level, you can harness your negative feelings into a usable source of energy, called cursed energy. These feelings can be harnessed into attacks or abilities. The number of cursed energy you possess is based on your class, some classes use a modifier that being charisma or wisdom (Player’s choice)

Your cursed energy DC is 8 + user cursed energy ability modifier + proficiency bonus.

Inversion
Starting at 1st level, you gain the ability to invert the damage you take. As a bonus action, you can spend 2 cursed energy to activate Inverse for 1 minute. While Inverse is active, when you take damage, it is modified based on a damage limit and threshold. The damage limit equals your proficiency bonus times your Cursed Energy score, and the threshold is equal to your proficiency bonus times your Cursed Energy modifier.

When you take damage that exceeds your threshold, you subtract the threshold from the damage and take the remaining difference as damage. However, when the damage is below your threshold, you subtract the threshold from the damage and take the resulting number as damage instead. For example, if your set limit is 100 and you take 90 damage, you would subtract the damage from your limit if it exceeds the threshold (e.g., 90 - 20 = 70), and take the remaining 70 damage. Conversely, if the damage is below the threshold (e.g., 10 damage), you subtract that amount from your set limit (100 - 10 = 90), and take 90 damage instead. If the calculation results in a negative number, the damage remains unchanged.

You can extend the duration of Inverse by spending 1 cursed energy to maintain the effect for an additional minute.

Extreme Opposites
At 3rd level, you’ve learned to further manipulate the damage you take based on its intensity. If you take damage that is below your threshold, you are considered vulnerable to the damage dealt. However, if the damage exceeds your threshold, you gain resistance to the damage, even if it would normally bypass resistances or immunities.

For example, if your threshold is 15 and you take 10 damage, you treat that as vulnerability. But if you take 18 damage, you instead halve it due to your resistance, even if that type of damage would normally ignore resistances.

Break the Strong
At 6th level, you’ve become adept at manipulating damage based on its intensity, even when making saving throws. When you are forced to make a saving throw against an effect that deals damage, the difficulty of the save depends on whether the damage is above or below your threshold.

If the damage is above your threshold, you have advantage on the saving throw, regardless of the damage type. If the damage is below your threshold, you have disadvantage on the saving throw, as weaker attacks become more dangerous to you.

For example, if your threshold is 15 and you would take 18 damage from a fireball, you gain advantage on the saving throw. However, if you take 10 damage from the same attack, you would roll with disadvantage instead.

Quick Inversion
At 11th level, staying with your technique active for long periods of time can become a disadvantage at times, so you have trained to have easier access to your technique. You can now use your technique as a reaction to damage and can deactivate your technique as a reaction.

In addition, you now have additional reactions equal to half of your proficiency bonus(rounded up) that can be used only for the inverse technique. At 18th level, this becomes a number of reactions equal to your proficiency bonus.

Domain Expansion: Synesthesia
At 18th level, you have mastered your technique allowing you to open your domain. Within your domain, you can activate Inverse as a free action an infinite number of times for no cost. At initiative 20, creatures of your choice have their senses inverted. Each creature rolls a d4 (1: taste, 2: smell, 3: touch, 4: sight) having a sense inverted and unable to be used. A creature can make a Cursed Energy check at the end of their turn to regain their lost sense.