Master's touch is a spell often found in the repertoire of adventurers who specialize in casting arcane spells. You gain proficiency with a single weapon or shield you hold in your hands when the spell is cast. The lack of a somatic component means the spell can be cast in the middle of a fight while you keep ready whatever items stand between you and danger.
This spell summons a tiny spectral bird that keeps a lookout over the warded area. The creatures attempting to sneak through or into the area must beat the bird's Perception check with their Stealth check, or be noticed by the bird. If the bird detects an intruder, it chirps loudly to notify the caster. The bird has Perception check equal to the caster's caster level.