DND 5th Edition

Source: I Made It the Fuck Up

2nd-level abjuration

Casting Time: 1 reaction, which you take in response to a creature you can see within range suffering an effect that would kill it (except rolling a 3rd failed death saving throw)
Range: 120 feet
Components: V, S
Duration: Instantaneous

In a desperate maneuver, you shunt aside the worst of death’s intent and leave a creature on death’s door. Rather than dying, the target creature falls to 0 hit points, becomes unconscious, and has 2 failed death saving throws.