Prepare as a Reaction to activate either of this Abyss Rune's effects. Activates when taking damage from an attack.  Activating the Retribution Effect raises the user's Dark Influence Level by 1.

Suffered Effect: Store the damage from the current incoming attack inside this Abyss Rune. Damage can be stored multiple times. The total stored value cannot exceed your Maximum HP. 

Retribution Effect: Your body emits a black mist while active. After taking damage from the current attack, unleash all the stored damage in a 25 ft radius Sphere, dealing Force damage to all living entities inside. Everyone inside the AoE must make a DC (User's current CON Ability Score) CON saving throw to take half damage and avoid a 10 ft knockback. The user takes Dark Influence Level * 1d10 damage and does not need to make a saving throw.

Notes: Must be Installed into your Flesh by a Flesh Architect Artificer.