Mark of the Beholder

You have manifested the mark of the beholder. Determine its appearance. You gain the following benefits:

• Have advantage on saving throws against magic.
• You gain proficiency in perception, if you are already proficiency in perception double your proficiency bonus.   
• You can randomly cast one of the following spells from your eyes, without requiring the components.  You must be able to see to use this feature. You can not use this feature again until you finish a long rest. 
  • Roll 1d4, on a
    1. ray of frost 
    2. ray of enfeeblement 
    3. ray of sickness 
    4. disintegrate