The Silent House — Ed Greenwood

It is known as the Silent House.
The Silvertree Stronghold is more than just an ancestral estate for a dynasty of warlords known for their wizardly powers and political cunning - it is their otherworldly protector.
But with the protection that has allowed them to overcome both rivals and inhuman ravagers (such as the dreaded faceless) has come a curse that leads to a corruption of the soul that forever binds one's power to the stronghold itself in a prison of magic and madness.
Now two daring treasure hunters hope to profit by unlocking the secrets of its past and harvesting the powers of its bounty...but unbeknownst to them an observer watches their every move and waits to make his presence known from the halls of eternity.
The Silent House is a Chronicle of Aglirta, the multigenerational tale of a powerful and feared wizardly dynasty.