The Shattered Web of the Spider Altar

When the sacrifice was interrupted, the altar cracked beneath the force of its own stolen power. The remains of the drow ritual were scattered across the chamber, with tribute chests split open by fleeing attendants and the giant spiders' venom stores left behind. Among the offerings are practical tools of the cult, valuable gems taken from drow noble houses, and several magical treasures intended for the high priestess. The Cloak of Arachnida still twitches as though caught in an unseen breeze, while the Shard of the Broken Web remains warm despite the altar's destruction. The hoard is substantial enough for a 15th-level party, but its most dangerous value may be the evidence it contains about Lolth's plans and the identities of those who funded the sacrifice.