I didn't see a thread about this, so I thought I would post a link to the new Monster Makeover article (it's free):
Dungeons & Dragons Roleplaying Game Official Home Page - Article (Monster Makeover)
It acts on two initiative counts, can treat stun and dominate as daze instead so it has a way of mitigating but not completely ignoring those debilitating conditions, and its curse power combined with its necrotic attacks and aura can allow it to do a lot of damage.
I think I probably would have given it an area or close attack, and added some sort of benefit for the demilich when soul drain drains a healing surge.
Dungeons & Dragons Roleplaying Game Official Home Page - Article (Monster Makeover)
It acts on two initiative counts, can treat stun and dominate as daze instead so it has a way of mitigating but not completely ignoring those debilitating conditions, and its curse power combined with its necrotic attacks and aura can allow it to do a lot of damage.
I think I probably would have given it an area or close attack, and added some sort of benefit for the demilich when soul drain drains a healing surge.