Shield Of Defense

 Modifies damage roll by -1 continuous.
 Modifies hit roll by -2 continuous.
 Modifies armor class by -8 continuous.
 Modifies hp by 10 continuous.
 Modifies mana by 10 continuous.

Level: 27
Slot: Offhand
Base AC: 6
Weight: 15
Mob: Evil Necromancer
Area: Dwarven Catacombs

to get to the catacombs, pp prism dragon. This area is a maze, so I just wandered around until I found the necromancer. It's easy to get lost, so set a recall at the dragon. You'll know you're getting close when you see fresh graves in the room descriptions. The necromancer himself may or may not be portable, but be careful trying.