As unfortunately high as these kobolds happen to have rolled, we have the first encounter of zero HP mechanics, so I'd like to give a quick refresher course in case any of you happen to need it.

Once a character's HP is zero or less, first we check if the amount of negative HP is higher than their maximum HP. If it is, instant death via massive damage occurs. If not, the character is left at 0, unconscious and unstable. If no outside effects are to affect them, they will simply roll a death saving throw on each of their turns, succeeding on a 10 or more. On a success, they add one death save success, on a failure (unsurprisingly) one failure. On a roll of a 1, two failures are added. On a twenty, the character is stabilised and gains 1 HP and conciousness immediately. If three failures are reached, the character dies. If three successes are met first, they are now stable, requiring no further death saves.

Effects from the outside that can affect them are damage, healing and stabilisation attempts. Upon taking damage, the character gains a death save failure (two on a critical). Healing lifts them up from 0 HP and they regain consciousness, immediately becoming stable. Stabilisation is a process that uses a helping character's action and has them roll a DC 10 Wisdom(Medicine) check. On a success, the target is stabilised.

A stable creature ceases to be stable if it takes any damage, and needs to roll the death saves until restabilised. If a stable creature is not healed, it regains 1 HP after 1d4 hours.