It's been a while since I had a go at writing an adventure and in this case it's really only an extension of someone else's writing. This mini adventure carries on from the 'Going Ape!' adventure for Dungeons and Dragons 4E, written by John Rossomango. I really like John's adventure and recommend it to other groups. The adventure expands the journey to wrap up the mystery of Cihuatlco.
The link to 'Going Ape' is here,
John leaves a secret passage in the last encounter room so I've had this lead to an underground cavern. In the underground cavern is another pyramid, much like the great pyramid of Giza. I spent a few hours reading about it on the web and used a diagram of it. The underground pyramid is stolen from the ideas presented in the movie 'Alien vs Predator'. As the king can't be resurrected from what John had written and a battle with the ghost of the queen would make no sense, I had few options as a climax or antagonist. The threats that the players discover are the cursed queens of the king, that have become mummies and can be released by destroying them. Aztec pyramids don't usually have mummies in them, but I just ignored that. I've also given the adventure a massive Necrosphinx as a guardian to the kings chamber, this will hopefully be the main event. The Necrosphinx has been taken from gameworkshop imagery and the ideas in the movie 'The Mummy Returns'. If you remember the Scorpion King, the stone Sphinx is meant to have that sort of feel.
There are a few questions to be answered for the players characters. What I do try to achieve is give the king and queens a name. There are not alot of traps in the burial pyramid and only a few encounters. One factor I didn't expect was that my players would disenchant the amulet with the kings life force inside. I assumed the last queen of Cihuatlco, Izel, had fixed her spirit to the crown. So when one of my players disenchants the crown, I had to improvise a roleplay scene with Queen Izel. Izel thanks the characters for removing the threat of king Huemac forever. You might find that players still want to know what happened to all the souls that king Huemac stole or that they want to collapse the pyramid, so I'll leave that up to you. My players enjoyed this, although they skipped most of the battles. I hope you find a use for it.