1-level Necromancy
Bolstering yourself with a necromantic facsimile of life, you gain 1d4+4 temporary hit points for the duration.
Whenever another creature within 10 feet of you dies, the amount of temporary hit points granted by this spell is restored.
At higher levels: When you cast this spell using a spell slot of 2nd level or higher, you gain 5 additional temporary hit points for each slot level above 1st.