The design, the movement, the beast itself. A thing so foul that can also be so beautiful. I find the whole MOC mesmerising.
The landscaping of the Dead Marshes, cleverly covering the mechanics, captures the scenery perfectly. The twisted branches, lit torches and bodies of the dead lying just below the water surface gives wonderful detail under the Nazgul and Fell beast.
Inspired by jkbrickworks wonderful movement MOCs, this and the rest of Marcin Otręba’s page are well worth checking out.
Even better, you can build you own by purchasing the designers instructions!