I´m afraid I will need your help for one last time (I hope so...).

Well, I have got through the whole pyramid-dungeon. I have used the Mavin Sword and the staff with the black fire, I have activated the Isis-Portal and saved Kerah from Cet´s influence.

I also found one "Champion Key" - a black monster with a name similar to "Satan" had it.

But unfortunateley the door to the final room is locked twice. I used the key I have got but I think I will need a second key as well. Can anybody please tell me where I can find this second key?