Web Sense

The user lays down a network of magical strings, thread or web over a 30ft Radius.
Any persons or creatures that start a moment within the trapped area, or enter the area on their turn must make a Perception, Insight or Find Traps to avoid triggering the web. Once the web is Triggered, the caster is aware of the exact location of the movement at that time.

These webs can be disabled using a successful disarm traps over the Spellcaster's AC, without triggering the web. Failing the AC will trigger the web, web can be burned which will destroy up to 30ft of web surrounding the activation point and will also alert the caster.
The area of effect increases by 5ft for every second level above lv1