From DDO wiki
|Item Type||Jewelry / Ring|
|Race Absolutely Required||None|
|Location||Tower of Despair, Rightside endchest|
|Description||This dented and scuffed ring belonged to Kilau, an arrogant and deadly Tempest. He was last seen entering a portal to Shavarath, shouting challenges for a worthy fight.|
Despite the description, the set bonus appears to do bleeding damage, and not slashing (undead and constructs are immune to it).