False Life

Source: Player's Handbook

Level 1 Necromancy (Artificer, Sorcerer, Wizard)

Casting Time: Action
Range: Self
Components: V, S, M (a drop of alcohol)
Duration: Instantaneous

You gain 2d4 + 4 Temporary Hit Points.

Using a Higher-Level Spell Slot. You gain 5 additional Temporary Hit Points for each spell slot level above 1.