If one goes to Negative hit points, the character is Incapacitated.<br/><br/>On the character's turn, player rolls Death Saving Throws. On three failed DST, character is dead. On three successful ones, character is Stabilized.<br/><br/>If one rolls a 20 on a DST, character wakes up with 1HP.<br/><br/>Instant death occurs when excess damage exceeds total HP. For example I have 1/30 HP, and I got attacked for 32 points of damage. It becomes an instant-kill.