Dark Edge of Insanity is a two-handed axe that had the highest melee DPS in the game at the time of its release. It was surpassed in DPS only by Might of Menethil and the Corrupted Ashbringer before Burning Crusade. The eye embedded within the axe blinks at you.
The axe looks similar to Astaroth's version of Soul Edge from Soul Calibur series.
Patches and hotfixes
Patch 1.9.0 (03-Jan-2006): Added