Khorne's Carnage

The blood god Khorne lives on in you with this exchange! 

Those who agree to this power gains the following benefit:

Immense psychic energy lashes out in the sound of the blood god Khorne's mighty cry. All individuals within a 120 ft radius of the user must roll a DC 16 Intelligence Saving Throw. A success if half damage, failure is full damage. As an action, roll a d100. The user can roll with advantage if they are in critical condition, or 10HP or below. The result of the d100 is the amount of psychic damage done to one individual or spread out several. 

3 charges which do not reset. 

The trade-off: The user must subtract 50% of the damage done from their own HP.