Axe of the Dwarvish Lords 25
Baba Yaga's Hut 13
Codex of the Infinite Planes 25 - The sister artifact, Codex of the Infinite Pains is much more useful.
Eye of Vecna 18
Mace of Cuthbert 7
Rod of Seven Parts 25
Sword of Kas 26
Wand of Orcus 23
Getting really difficult choosing which to vote down