The web spell could be learned and cast by wizards and sorcerers with access to the conjuration school of magic. In the time of Netheril, it could be cast by arcanists of the Inventive specialization. In Zakhara, elemental mages and sorcerers could learn it as part of the universal province.
After the Year of Wild Magic, 1372 DR, a caster could, up to a distance of 100 ft (30 m) or more depending on their level, create a multi-layered collection of strong and sticky strands or fibers. These were rather like spider webs, but were much thicker and tougher. These spread over an area 40 ft (12 m) wide, but the strands had to be anchored to stable, diametrically opposite objects; a part of the web that was not so anchored would collapse in on itself and vanish. These strands entangled creatures caught within the web, hampering their movements. One had to either force their way or slip nimbly between the strands in order to pass through them. One who was unwary or too slow to react when the spell was cast could become trapped in place, and only with a great feat of strength or escape artistry could they break free.
A web spell lasted tens of minutes according to the caster's power, but it could be made permanent through a permanency spell. The strands were flammable, so the web would slowly burn if ignited, injuring creatures caught within. A permanent web that was damaged but not wholly burned would regrow in ten minutes.
In addition to verbal and somatic components, a casting of web required a small piece of an actual spider web.
In the Year of the Prince, 1357 DR, Kyriani Agrivar and Onyx the Invincible dueled the wizard Parwyyd Hanifar and his personal assistant Dunstanny outside the Great Door. Moving into a niche, Dunstanny suggested that Parwyyd employ a web over the entrance, anchored high and low with minimum depth. It soon trapped Kyri and Onyx like flies and ended the fight.
- ↑ 1.0 1.1 slade, James Butler (November 1996). Netheril: Empire of Magic (The Winds of Netheril). (TSR, Inc.), pp. 22, 24, 28. ISBN 0-7869-0437-2.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Jonathan Tweet, Monte Cook, Skip Williams (July 2003). Player's Handbook 3.5 edition. (Wizards of the Coast), p. 301. ISBN 0-7869-2886-7.
- ↑ 3.0 3.1 Jeff Grubb and Ed Greenwood (1990). Forgotten Realms Adventures. (TSR, Inc), pp. 149, 150, 152. ISBN 0-8803-8828-5.
- ↑ 4.0 4.1 slade, James Butler (November 1996). Netheril: Empire of Magic (The Winds of Netheril). (TSR, Inc.), p. 121. ISBN 0-7869-0437-2.
- ↑ 5.0 5.1 Jeff Grubb and Andria Hayday (April 1992). Arabian Adventures. (TSR, Inc), p. 152. ISBN 978-1560763581.
- ↑ Dan Mishkin (April 1990). “The Ostus Legacy”. Advanced Dungeons & Dragons #17 (DC Comics), p. 13.