Venari Apex

Choose a target creature within range. That creature must succeed on a Charisma saving throw against your spell save DC. 

On a failure, whenever you hit the creature with an attack for the next minute, you deal an additional 2d12 force damage. Additionally, whenever you're moving towards the creature, your speed increases by 10 feet. Whenever that creature is moving away from you, their speed decreases by 10 feet. 

On a successful save, whenever you hit the creature with an attack for the next minute, you deal an additional 1d12 necrotic damage instead. 

If the creature you target with this drops to 0 hit points before the spell ends, you can target a new creature with this spell using your bonus action. They must also make the Charisma saving throw.