When you cast this spell, it is possible for you to detect the greatest vulnerability, flaw, or weak point in the design of a material object or the body of a creature.
If you are more than 15 feet and no further than 30 feet from the target when you cast this spell, add 1d8 to a Perception or Insight roll. If your distance is 15 feet or less from the target, add 1d8 and 1d6 to a Perception, Insight, or Investigation roll. The DC for this roll is 15.
If successful, you have knowledge of the creature or object’s greatest physical vulnerability. If cast as an action during combat, you may use no form of movement as a bonus action, and the vulnerability is revealed to you at the beginning of your next turn; otherwise, the answer comes instantaneously. If you are attacked between turns, your concentration is broken and the spell reveals nothing.
This vulnerability can present as an unguarded place, a weak spot in armor, a design flaw, a vulnerability to a specific type of damage, or anything else at the DM’s discretion. The spell does not reveal psychological weaknesses, vulnerabilities in anything made purely of magic, or flaws in magical protections, but can reveal flaws beneath them if they are visible.
With the knowledge gained from the spell, you or any other creature with this knowledge can add 1d10 against the target’s DC on any future attack or interaction that exploits this vulnerability. If the target is a creature, successful attacks using this vulnerability add 1d8 to their damage.
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