Level
1st
Casting Time
1 Action
Range/Area
Self
Components
V, S, M *
Duration
Instantaneous
School
Necromancy
Attack/Save
None
Damage/Effect
Buff
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.
* - (a drop of alcohol)
Yes it last till a long rest. They realized that it was a dead spell before, no one wants to use a spell slot for 1d4+4 hp for 1hr.