[Celacena]

if you watch the ending - you see Jack sitting there with a mummy. he makes the remark 'you don't talk much do you?' in the way that people joke about the dead. IMO he has taken the mummy from the sarcophagus and thinks it a laugh to have it sitting there 'watching' the destruction of the tower.

notice that the tower is still in the process of construction - remember the Biblical Tower of Babel ? LaX's tower is symbolic of his rule/ambition - it is not yet complete, so now is the time to destroy it.

I have watched the ending a few times and there is no suggestion that the mummy is animated. from what is said, the mummy King may well have been a ghoul - long life but not unending. it shows that the sarcophagus was not empty when it was discovered, but as you only see jack, the PC and the cabbie at the end - there is no confirmation that Gary is fully involved. Beckett is an enigma - he appears to know about the bomb and warns the PC not to open the box. the PC feels that Beckett is 'not quite himself' at the meeting in the street and that made me wonder if it was Ming playing games again.
Pisha also senses a massacre due to take place - what does she know?

there IS no antediluvian in the box - but who knows about the cabbie ? - there are suggestions that he is Caine and I do not know the background mythology well enough to speculate. the dialogue in the cab and his association with Jack make him crucial.