A player in my group plays a Wizard who favors terrain controlling spells. One such spell that he uses is Web. Up to this point he would cast Web and it would spread on the ground, with it's effects as normal. Now after reading the spell myslf, I'm not so certain if it's supposed to work that way.

The first paragraph states that the webs must be mounted between solid anchors:

Web creates a many-layered mass of strong, sticky strands. These strands trap those caught in them. The strands are similar to spiderwebs but far larger and tougher. These masses must be anchored to two or more solid and diametrically opposed points or else the web collapses upon itself and disappears.

I read this as two trees, or two pillars, etc, and not just spread on the ground. It says without these anchors the web just collapses and disappears. However, it also says that it effects a range of a 20 ft radius. Having it spread horizontally across the ground to me seems counter to the nature of it having to be anchored. But then does it spread vertically? The wording on this is very confusing and I'd like a second opinion before I do or do not return to my player and inform him he may or may not have been using Web incorrectly.


3 Answers 3


All Area of Effect Spells are Three-Dimensional Unless Otherwise Specified

Note the use of the phrase many-layered in the Web description. All areas of effect in 3.PF are fully three-dimensional unless, such as in the Blade Barrier spell, a different area is specified. Web does not specify that it isn't three-dimensional and as such takes up the entire space of its area between the two anchor points.

As far as that not making physical sense...friend, it's Pathfinder. This is pretty high on the 'making physical sense' scale. Rules don't translate well to physics.

  • \$\begingroup\$ Fair enough, but my question was more about by anchors, does it mean pillars or trees or some other form of upright sturdy object? Given the way the spell is worded I imagine just casting it on the ground shouldn't work, but I'm uncertain. \$\endgroup\$
    – Pogiforce
    Commented Jan 24, 2014 at 2:59
  • 4
    \$\begingroup\$ @Pogiforce Many spells are designed to be cast in narrow dungeon corridors, and make the most sense when imagined in that context. Incidentally, there's nothing that says the anchoring points have to be upright; A sufficiently close floor and ceiling work as well as a pair of pillars. \$\endgroup\$
    – GMJoe
    Commented Jan 24, 2014 at 3:03

You are correct, the Web needs to be anchored between walls, pillars, a floor and ceiling, etc. It can't be cast "out in the open" and it doesn't cover the floor like a rug. (It covers the entire radius, so it's effective against flying folks).


Web does not work in the open, per se. If cast on a group in the open, it will exist between them, but not outside that group, per the description.

In an enclosed space, however, it creates a stable mass.

  • In a tunnel, it typically fills the tunnel for the effect diameter's length, in other words, 40' of tunnel up to about 10' wide and tall.
  • in a crevass or ravine, it will create a sphere, chopped at the walls, but may have open space above and below.
  • in a large, but not tall, room, like a 60x90' throne room with a 20' ceiling, it will create a roughly 30' diameter cylinder of web, stretched floor to ceiling.
  • in a collonade more than 40' tall, it will create column width lines of web connecting all pillars within the radius of effect; if the effect is centered at waist height, this happens with a 20' or taller ceiling. If the outer walls are beyond the radius, then no connection to them happens.

A generous GM might allow an angled "opposed" position, but that violates the intent.

  • 2
    \$\begingroup\$ Authorial intent is impossible to prove and I'd politely suggest that you remove that part of your answer. \$\endgroup\$ Commented Jan 24, 2014 at 15:39
  • \$\begingroup\$ Gareth: the intent in this case is explicit by "diometrically opposed" - so - not a F*ing chance. \$\endgroup\$
    – aramis
    Commented Jan 25, 2014 at 1:53
  • 1
    \$\begingroup\$ In that case, you would communicate much more clearly to say that it violates the RAW. \$\endgroup\$ Commented Jan 25, 2014 at 4:34

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