Blood Bolt

2nd-level Necromancy (Warlock, Wizard)
Casting Time: 1 action
Range: 60 feet
Components: VS
Duration: Instantaneous
You hurl a spear of blood at a target you can see within range. Make a ranged spell attack on hit you deal 1d12+ your Spellcasting modifier necrotic damage to the target. You regain the amount of damage dealt this way as HP, excess HP becomes temporary hit points that last for 15 minutes.
At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d12 for each slot level above 2nd.