Sleep

You cast the sand in the direction where you want to cast the spell.
All creatures in the radius must make a Fortitude save against your INT CL. On a failure, they fall fast asleep and are Prone and Unconscious for the duration.
On a critical failure, the creature cannot wake up for the full duration of the spell.
A creature can use its Main Action to wake a sleeping creature. When a sleeping creature takes damage, it will also wake up.
This spell has no effect on Undead, Constructs and Sídhe creatures.