1-level Necromancy
When you cast this spell, the runes of the spell run along your veins, giving you a look not unlike a blood disease. While this spell is active, if you brought below 0 hp, but not killed outright, your body suddenly erupts in a glassy sheen. While covered in this glassy sheen, you are under the effects of Petrification, except you are fully aware of your surroundings. You can not communicate, even telepathically, but can fully hear, see, and even smell everything. You do not make death saves and any ongoing effects on you, such as acid or disease, are paused for the duration of the spell. The spell ends if dispelled, destroyed, at will, or when the duration ends. If attacked, the hard glassy shell is considered to have an AC of 13 and 50 hp. Regardless of how the spell ends, the caster will immediatly suffer 1 failed death save when it ends, a point of exhaustion, and falls unconscious.