Aelin's Illusion

You create a Medium or smaller orb of light within range that lasts for the duration. The illusion also ends if you dismiss it as an action or cast this spell again. 

The wisp sheds dim light in a radius of 10 feet.

If a creature uses its action to examine the wisp, the creature can determine that it is an illusion with a successful Intelligence (Investigation) check against your spell save DC. If a creature discerns the illusion for what it is, the illusion disappears and creates smoke in a 15 foot radius of where the illusion was.