Conceal

When you use this spell anyone and everything that they have on their person that is within 10 feet of the Caster is invisible to any creature that would be in sight of you, and if a smarter monster at 16 INT. or higher knows your position then you roll a d20 and add the relevant modifier for perception of the Monster. Saving throw for this spell is at least 10 on a d20 of a chance to be seen by the monster. If the perception of the monster's roll is greater than your saving throw then you are seen and if the saving throw is greater than the perception than vise versa.