You searched for circle of salt
1. circle of salt
Syntax: cast 'circle of salt'
By sprinkling salt on the ground in the shape of a circle, Witches can trap
monsters who are tracking them or simply enter the room for up to 100
seconds, once the spell has been mastered. While a monster is trapped in
the circle, it is harmed every 3 seconds, the amount of harm based on the
caster's level.