Grendel (50 - 70) offers a few tasks to be completed.
1.5 Enhancement Aug (You can have 2 of these) - Completed in The Ruins of Sebilis (sebilis) by killing the gangrenous scarab, froglok armorer, froglok armsman, froglok chef, frenzied pox scarab, Gruplinort, and Brogg.
2.0 Epic Weapon - Completed in soldungb, permafrost, and beholder (these are the zone shortnames to tell Stephen Strange). Collect Filament of Epic Power from Lord Nagafen in soldungb, Conductor of Epic Power from Lady Vox in permafrost, and the Incomplete Harness of Epic Power from The Fabled King Xorbb in beholder.
Combine the Filament of Epic Power and the Conductor of Epic Power in the Incomplete Harness of Epic Power to create Completed Harness of Epic Power!
Turn in the Completed Harness of Epic Power to Grendel to receive your epic 2.0!