Web
You create webs that obscures vision and entrap creatures within their volume of effect. The webs take up a 10 cubic metre volume as long as they can attach to walls, roof, or any vertical structures. If no such structures are available the webs collapse to the ground in a 10 metre square area.
The terrain is difficult within the webbed area.
If the webs are a volume, then all creatures within it must make your imp(sv,Strength,8+M*) or be restrained for the round. On each of their turns, the creature can attempt another Strength save to see if they can escape the restraints and move half their speed. If the creature begins its next turn still within the web, they must make another Strength save.
With higher modifiers, you can increase the range of the conjugate and volume of the webs. For every point in M*, you add a metre to the range and 1 cubic metre to the volume.
Industry: Materials
Conjugate (technique): Conjugate (Materials), R/M = R/M(this)
Actions: conjugate(main-act, 10hp 2ep 1fp) with 30+M*(range), 10+M*(volume) then webs imp(sv,Strength,8+M*) for 1 scene
Any creature capable of Blink, Blur or capable of the Quantum Tunnelling, can of course, circumvent the wall entirely.