Deathsight

Using the powers of necromancy, you can determine the condition of creatures near death within the spell’s range. You instantly know whether each creature within the area is dead, dying (making death saving throws), fragile (alive and wounded, with 1/3 or less hit points remaining), bloodied (alive with half hit points or less remaining), healthy, undead, or neither alive nor dead (such as a construct). Deathsight sees through any spell or ability that allows creatures to feign death.