Painful Slumber Of Ages

Warlock Invocation
Level: Greater, 6th
Components: V, S, M
Casting Time: 1 standard action
Range: Close (25ft +5ft/2lv)
Duration: Permanent
Saving Throw: Will
Spell Resistance: Yes

You can use deep slumber as the spell, except as follows:

Permanent Duration
No HD limit.
A new saving throw every 24 hours can be made to wake up.
Any damage causes the target to rouse immediately.

Any creature awakened from this effect by anything other than a successful save takes damage equal to your warlock level (no save).

(Complete Mage, Page 124)