When the last humanoid creature dies within 30ft, make a wisdom saving throw of DC17. If succeeded, nothing happens. if failed, the character must wildly save the last downed creature using ANYTHING at their disposal.

The creature IS revived to D4/D6 hit points, depending on what was used and how, but is unable to take any actions other than speak (or scream in pain) due to is injuries.

The DM can determine how long the creature can live in its state. but the creature WILL die again.