Vatic Gaze

(Player's Handbook II, page 85, DnD 3.5)

[General]

Your arcane studies have brought forth your nascent talent to sense magical auras and the power that others are capable of wielding.

Prerequisite

arcane caster level 9

Benefit

You can use detect magic at will. Also, as a swift action, you can attempt to determine an opponent's spellcasting ability. You make a Sense Motive check (DC 5 + target's caster level). If this check succeeds, you learn the highest-level spells the target is capable of casting. This benefit grants you no insight into spell-like or supernatural abilities.