Death Cap

If you have less than 60 Hit Points, you are immediately reduced to 0 Hit Points, fall Unconscious and start making Death Saving Throws. If you have 60 Hit Points or more, you are reduced to 0 Hit Points and fall Unconscious but Stable instead, regaining consciousness in 1d4 days. During this time, you cannot regain consciousness by any means short of the effects of the spells Greater Restoration, Lesser Restoration or similar magic.