Ensoul Artifact

In your last moments of consciousness, you use the last bit of your energy to cause your physical form to inhabit one item that you are carrying - trapping your soul within that item. The item becomes a Sentient Magic Item. Its properties are determined by your DM. Your physical form then falls, and you automatically fail any death saves. Any spells that would prevent you from being reduced to 0 HP, recover from being reduced to 0 HP, or otherwise prevent death no longer take effect.