Gargantuan Spiders are the largest of the various species of Giant Spider. They are, in essence, the same to Giant Spiders as as Giant Spiders are to Huge Spiders. A not-so straightforward upgrade, however; these spiders possess two special abilities in Siege of Dragonspear: Web Tangle (inflicts paralysis for 2 rounds on a failed save vs breath with a -2 penalty) and an on-hit effect for their melee attacks that inflicts sleep for 5 rounds on a failed save vs death with a penalty of -2. Like all of the monstrous spiders, they are immune to the effects of Web.