The spell must be cast on a monster. The spell provides basic information about the monster that is useful in combat. It is a weaker version of the Lunar spell Monster Examine.
Applicable to whatever melee style the NPC uses by default.[1] For example, casting the spell on Justiciar Zachariah would display an Attack bonus of 200 under the Aggressive Stats tab. This means that in actuality, he has a Slash bonus of +200, as slash is the only melee style he uses.
^Jagex. Mod Ash's Twitter account. 20 February 2018. Archived from the original on 30 May 2020. Mod Ash: "You know how that spell lists "Main attack style"? If the listed main attack style is stab, slash or crush, the attack bonus will be its accuracy bonus in that style."
^Jagex. Mod Ash's Twitter account. 21 June 2018. Archived from the original on 30 May 2020. Mod Ash: "[Is ["Magic str bonus"] equivalent to the Magic Damage % for players?] Yup."