Rescue

1st-level necromancy

Casting Time:1 action
Range: touch
Components: V, S
Duration: 8 hours

A creature you touch is protected from death. When the creature could be reduced to zero hit points, the target is not completely destroyed, and the source of that damage finishes, that target regains 1d4 hit points.

Instantaneous duration damaging spells cause this spell to instantly occur once the damage completes, but spells that do continuous damage like ice storm or environmental conditions or effects like crushing rocks will cause this spell to only heal the target once the effect is removed if removed before the end of the spell. Once the spell is triggered, the spell ends

This spell has no effect on undead or constructs.

At Higher Levels: When you cast this spell using a spell slot of 2nd level or higher, the number of targets increases by 1 for each slot level above 1st.

Thoughts?