is an Advanced Dungeons & Dragons (AD&D 2nd edition) module released in 2000[1] by Wizards of the Coast.

The module is divided into three sections, each taking part in a different campaign setting: Greyhawk, Ravenloft, and Planescape.

[2] This adventure, and Vecna's multiverse-shattering plan contained within it, have been used by some D&D fans as an in-game explanation of the differences between the 2nd and 3rd editions of Dungeons & Dragons.

as an original adventure that touched upon the oldest locales and the most ancient myths of the D&D game, while still presenting something entirely new.

The result was […] an adventure that played two ancient artefacts – the Eye and Hand of Vecna – against the cambion demigod Iuz and which featured a trek through the campaign settings of Greyhawk, Ravenloft and Planescape.