Bloodshield

You sacrifice your own vitality to create a shield above the flesh of an ally. You immediately take 2d4 + 2 necrotic damage. This damage cannot be reduced or prevented by resistance or immunity to necrotic damage. The triggering ally immediately gains temporary hit points equal to twice the damage you take, and these hit points immediately absorb as much of the triggering damage as possible. If there is damage remaining, the spell ends and the ally takes all remaining damage as normal. Any remaining temporary hit points disappear at the start of your next turn.

At Higher Levels: When you cast the spell using spell slot of 2nd level or higher the spell’s damage increases by 2d4 for each slot level above 1st.