Chom-Vrone
From Wookieepedia, the Star Wars wiki.
Chom-Vrones were large worms used as drills by the Yuuzhan Vong. They were shaped like cylinders, a hundred meters high and nearly that wide, made of yorik coral. It digested rock, turning it into plasma. When it had a full load, hundreds of meter-wide tubes would extend from the top of the Chom-Vrone, spewing the plasma out onto the surrounding ground.
It is unknown what became of the Chrom-Vrone after the war ended; though it can be assumed they were transplanted on Zonama Sekot or loaded onto the warships of the Yuuzhan Vong and sent crashing into Coruscant's primary.
