Devilish reveal

Devilish reveal.

Devilish reveal can be used on one person within your sight. This person instantly sees the vision for just an instant and then are back to normal. Only this person sees this vision. No components required just direct eye contact. 

The vision. The person has a vision just for an instant as seeing you "true form" as either a demon/devil/evil spirit/etc. You can choose any option as long as its dark/evil/sinister, if you are looking for a divine or angelic vision look at this sister spell "divine reveal" , speak to you DM/GM for options.

After this vision this person has to pass a wisdom saving throw against your spell save DC or else they will believe that you are without a doubt said entity or have the soul of said entity. Speak to DM/GM of the effects of that.

If the person passes you can not perform this again but although they won't truely believe that you are said entity but they should still react to this vision and should be frightened. If they failed you can perform it again at your DM/GMs discrepancy.