In the RPG version of the Aspect of Orcus, the wand's effect is:
1/day-Death Strike: a creature struck by the wand must make a Fort DC 17 save or die.
Unfortunately, the death strike must be activated before the attack roll is made.
Still, with the wand being +16/+11 melee (2d6+10/19-20), it's pretty good.
Here's my guess at the mini's stats:
ASPECT OF ORCUS
LVL 9; SPD F4, AC 21, HP 105
Melee Attack: +16/+11 (15 magic)
Missile Attack: -
Type: Large Outsider
Special Abilities: Independent. Cleave. Death Strike [] (on a successful melee attack, target living creature makes a DC 17 save or dies); Immune Electricity, Poison; Resist Acid 10, Cold 10, Fire 10. See Invisible.
I haven't taken his Power Attack into consideration in the attack scores, though.
Cheers!