In
NetHack, the Invocation is the little
ritual you have to perform, using the
Invocation Artifacts, to get at
Moloch's Sanctum and acquire the coveted
Amulet of Yendor.
Full disclosure follows -- if you don't want to hear it,
back out now!
On the very bottom level of Gehennom, there is a square that vibrates when you stand on it. Make sure you have all of the Invocation Artifacts, and that they are all uncursed or blessed (it's alright if the candles for the Candelabrum are cursed, though). Take a deep breath, and then...
- Install the seven candles in the Candelabrum
- Light the candles
- Ring the Bell of Opening
- Read the Book of the Dead
In game terms, this means
apply the
candles to the
Candelabrum,
apply the
Candelabrum, apply the
Bell, then read the
Book. If you do all this correctly, a
staircase down and a
moat should appear. Once this happens, you can discard the
Invocation Artifacts as they are no longer necessary. You can then proceed downstairs to the
real bottom of
Gehennom, where the
Amulet of Yendor is held by the
High Priest of
Moloch.