Dying

If you are reduced to 0 hit points by damage that fails to kill you, you fall unconscious and are dying.
If you receive any healing you immediately regain consciousness again and no longer dying.
When dying, at the start of each of your turns you make a death saving throw. Roll a d20 and do not add any modifiers.
A 10 or higher is a success, 9 or lower is a failure.
On your third success, you become stable.
On your third failure, you die.
Rolling a 1 counts as two failures.
Rolling a 20 immediately causes you to regain 1 hit point.
You can also be stabilized by an ally taking the Stabilize action and succeeding on a DC 10 Wisdom (Medicine) check.
Once stable, you regain 1 hit point after 1d4 hours.