Death Coil-Modified

Fire a blast of unholy energy at a creature or object within range. Make a ranged spell attack against the target. On a hit, the target takes 1d8 necrotic damage. If you target an undead creature under your control, it gains 1d6 temporary health instead(The creature can only receive temporay health if it has rolled initiative/the person who controls the creature has rolled initiative. When combat ends it becames again invalid the gain of temporary health till the next initiative roll).

This spell's damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8). The amount of temporary health gained increases by 1d6 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6).