False Life

1st-Level Necromancy
Casting Time: Action
Range: Self
Components: VSM (a small amount of alcohol or distilled spirits)
Duration: Instantaneous

You bolster yourself with a necromantic facsimile of life.

Effect. You gain 2d4 + your spellcasting ability modifier Temporary Hit Points.

At Higher Level. You gain 3d4 additional Temporary Hit Points for each slot level above 1st.

Source: PHB 239, SRD

Changelog

Altered duration from 1 hour to instantaneous.
Increased base temp HP to 2d4 and upcast to 3d4.