Drain Life

You create one glowing tendril of lifedraining force. The tendril hits a creature of your choice that you can see within range. A tendril deals 1d4 + 2 necrotic damage to its target.                  The Caster gains Temp.HP, that equals the damage dealt. 

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the spell creates one more tendril for each slot level above 1st.                                                                                                        The tendrils all strike simultaneously, and you can direct them to hit one creature or several.