Angel Choker

this magical necklace has been imbued with the blessing of your deity.

when you reach 0 Hit Points, immediately make a Death Saving Throw with the DC being either 10 or half the damage you took (whichever is higher). upon a success you immediately regain half your maximum Hit Point and stand back up on your feet. failing this Death Saving Throw will not count as a failure towards death.  

once you use this feature, you cannot do so again until you finish a long rest. alternatively, you may use your action to expend one use of your Channel Divinity to regain this feature immediately. 

Notes: Cleric or a Paladin