Dominate Soul

Whenever you reduce a creature to 0 hit points, you slay the creature and commands its soul to do your bidding for the next minute, unless the creature is a construct or undead. The phantasmal arms of your victim reach upward causing the ground beneath it to become difficult terrain in a 15ft radius. Additionally as a bonus action, you can command the soul to do additional damage to any creature within the radius, or move it up to 30 feet in any direction. Creatures who take damage must succeed a DC 10 Strength saving throw or become restrained.

The damage is proportionate to the size of the creature and your character level.

• Souls of a Medium creature or smaller deal 1d6 necrotic damage.
• Souls of a Large creature deal 1d8 necrotic damage.
• Souls of a Huge creature or larger deal 1d10 necrotic damage.

This ability's damage increases by 1 additional die when you reach 5th level, 2 additional die at 11th level, and 3 additional die at 17th level.