Essence Drain

Fire a projectile of necrotic energy at a creature within range. Make a ranged spell attack, and on a hit, deal 1d12 necrotic damage and tether the creature to you using the same energy. The tether drains the life of the creature on the beginning of each of their turns for the duration, dealing 1d8 necrotic damage and healing you for the damage dealt. The target can make a Wisdom saving throw before taking the damage, and if they succeed, the spell ends. The spell also ends if the creature is out of range.

When you cast this spell at a level higher than 1st, add an additional 1d12 necrotic damage to the projectile and 1d8 necrotic damage to the tether.