Jade Sentinels

The Jade Sentinels are giant robots or just one trapped within the Sands. The Sands were presumably created to help trap the Sentinel(s). Israphel and his cult seem to be attempting to reactivate the Sentinel(s) as part of their evil plot to free the Sands.

History
The giant hand of one Sentinel was discovered by a team comprised of Templar Enoch, Professor Griswald and others. However, there were no survivors, as the corruptive influence of the sands slowly turned Templar Enoch evil and he killed off the others before being killed by Israphel himself (presumably). Meanwhile, the mysterious builders of the Jade Sentinels seem to have built a power station to activate them in an end-of-the-world scenario. King Finbarlater activated the system, though he was killed in the resulting fight with the three heroes. The system was ready to begin three days and seven hours after Finbar's death. Later, the three heroes Xephos, Honeydew and Knight Peculiar discovered the hand as well as the diary and remains of Templar Enoch. Later, while exploring the insides of the Sentinel on minecarts, Knight Peculiar tragically died when his minecart fell through a break in the tracks and into the radioactive lava found inside the Sentinels. Xephos and Honeydew were left alone to search the Sentinel without their trusted ally and old friend.

Construction
The one sentinel known so far has the build of a massive robot and many mechanical parts, including a giant hand which sticks up through the Sands and into the air, radioactive green lava for blood, a cloning machine which produces evil duplicates of the person cloned and a separate power core. It is probably much larger than is apparent and very powerful, as it was only to be activated in an end-of-the-world scenario and the Sands were built to imprison it despite their own incredibly dangerous power, suggesting that the power of the Sentinel program is even greater.