Deathly Ward

You have spent so much time with the spirits of the dead, some of their unnatural gifts have begun to seep into your soul. You gain the following benefits:

• Increase your constitution score by 1 to a maximum of 20
• Critical hits do not deal extra damage against you, unless the damage is radiant
• When you take enough damage to drop below 0 hit points, you can attempt a constitution saving throw (DC equals 5 + half the damage taken). On a success, you drop to 1 hit points instead, and you can't use this feature again until you finish a short or long rest.