Vapor Ward

Vapor Ward is a Level 3 spell in Hide and Shriek.

Description
Vapor Ward Conjure a blinding rune of visibility 
 * Type: SpellTarget Floor.png Floor
 * Runes: Runes FrightTrap.png Runes PerilSight.png Runes GhostFlame.png

Conjures a hidden rune on the floor
 * Whoever triggers this is visible and leaves a green trail floating behind them when they move
 * Effect last for about 30 seconds, trail itself dissipates after about 5 seconds of not moving.
 * Person who triggered it is not visible through walls

"In an apocryphal account, a Roman occultist humored his laughter, placing warding sigils on her bedroom floor, to prove her imaginary friends were not stomping about at night. Hours later, smoky figures - with only the vaguest suggestion of terrible symmetry - loped out of her room."