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Message: <blockquote data-quote="apsuman" data-source="post: 356693" data-attributes="member: 1769">I would apply some grapple and bull rush inspired rules here.Use the following modifiers:Colossal +16Gargantuan +12Huge +8Large +4Medium-size +0Small –4Tiny – 8Diminutive –12Fine –16And do a d20 Strength check.  I would double the above modifier if the bolder were doing a double move (more than 20 feet round) and triple it if the rock is hustling (more than 40 feet per round).So take for example a rickslide happening at top of a hill,  The rocks just started moving and the sorcerer casts web.  Even the colossal rocks don't get too far.  the colossal rocks roll on average 10.5 (say 11) add the 16 and you get a "strength check" of 27 and by the web descriptions the rock would move five feet.Right after the rocks start downhill those collossal rocks would roll 11 (+16 * 2) for a total of 43, moving 20 feet through the web.At the bottom of the hill the rock would be moving so fast that it's average strength check would be 11+ (16 * 3) or 59, meaning that the colossal bolders would rip through 35 feet of a web.In all the above example the rocks would be held fast after their initial busting through the web.All in all I would say that the web spell could be an excellent way to stop (especially in the early stages) an avalanche.Smaller rocks would be even easier to stop.g!</blockquote>