Deathfire Grasp

Target a creature of your choice to make a constitution saving throw. If the creature succeeds the saving throw they take half of the initial damage then the spell ends. If the creature fails a blue spectral hand brands the chest of the creature with Death Fire Grasp. Each round on the start of the targets turn the green hellish fire pulses with more and more energy taking a toll on the enemy. The initial damage of this spell is 5d8 Necrotic Damage which increases by 1d8 round the spell is on the target. The target may make an additional saving throw at the end of their turn if the target succeeds the spell ends if not it continues to the next round. If a creature is taken to zero hit points by Death Fire Grasp and dies they can not be brought back by any resurrection spell lower than 5th Level.

When you cast this spell using a spell slot of 6th level or higher, you can target one additional creature for each slot level above 5th. In addition the resurrection requirement goes up as the spell similarly.