Sandworms and Olgoi-Khorkhois are level 5 creatures of Factory. They are recruited from the Catacombs.
Heroes with a specialty
Agar the Artificer has Sandworms as a specialty, which increases the attack and defense skills of any Sandworms or Olgoi-Khorkhois for each level attained after 5th level, and gives them a speed bonus of 1.
Special abilities
Like Troglodytes, Sandworms and Olgoi-Khorkhois are immune to vision-based abilities.
Burrowing
Burrowing is a special movement type. In most cases, it is functionally identical to Flying. However, on certain battlefields - namely combat on a Boat or Airship - Sandworms and Olgoi-Khorkhois cannot burrow. In this case, they instead act like regular walking creatures, alhough they suffer no speed penalty.
Devour Corpses
Olgoi-Khorkhois can be ordered to devour any corpse on the battlefield in range of regular movement instead of a regular attack/move, receiving a bonus strike on their next attack after this and preventing the devoured corpse from being interacted with (for Resurrection or Summon demons). Olgoi-Khorkhois can stack up an unlimited number of additional strikes, however all bonus attacks will be consumed by their next attack whether or not all attacks were successfully performed.
It is possible to devour multiple corpses at once if they happen to stack on one hex. The mouse hover interface will show how many corpses will be devoured on that specific hex.
If the Olgoi-Khorkhoi dies, the bonus strikes count does not reset. If the stack is Resurrected, all accumulated bonus strikes will still be available.
See also:
Factory creatures 
Halfling
Halfling Grenadier
Mechanic
Engineer
Armadillo
Bellwether Armadillo
Automaton
Sentinel Automaton
Sandworm
Olgoi-Khorkhoi
Gunslinger
Bounty Hunter
Couatl
Crimson Couatl
Dreadnought
Juggernaut
