Webbing

You point with the cocoon to a point in range and a massive web of 20ft. radius appears of thick sticky strings.
If the web is not anchored properly connected to the walls, floor or ceiling) it will collapse or fall down as a sticky net.
Any Creature touching the webbing must make a Fortitude save against your INT. save CL..
On a failure, they are Grappled and Restrained.

The webbing can be torn with a CL. 16 Athletics skill check freeing one creature per check.
The webbing is immune to Bludgeoning, Piercing and Slashing of non-magical attacks.

If the webbing touches a source of Fire, it will be engulfed in flames, and all creatures in the area of effect will take 2 D6 Fire damage.
This last for 2 rounds as the webbing will then be destroyed.