Cloak of Sinovius

This spell masks your true from so that it appears as a disguised form of your choice that can be seen. Your disguise is protected from any kind of detection up to and including True Seeing and True Sight. It does not provide any other protection. Likewise, it does not change effects based on creature type. If your behaviour would allow others to become sceptical of your true nature that possibility remains. 

If the focus for this spell (a dragon scale) is more than 1 foot from you (including being in an extra-dimensional space, like a bag of holding) or is otherwise destroyed, this effect immediately ends.

The duration of the spell lasts for two days, and can be increased by one additional day for each spell slot above 7th level.