|Featured In||The Stormlight Archive|
Thunderclasts are enormous beasts made of stone. They seem to be skeletal in shape, with long limbs, and with things that resemble ribs. They have red eyes with an arrow-like head. The hand of the beast is about six feet tall. In one of his visions, Dalinar oversaw the battlefield and described creatures that could also have been thunderclasts.
”Those aren’t stones. They’re creatures. Massive creatures, easily five or six times the size of a person, their skin dull and grey like granite. They had long limbs and skeletal bodies, the forelegs--or were they arms?--set into wide shoulders. The faces were lean, narrow. Arrowlike.
In another vision, Dalinar sees a thunderclast created, as a hostile spren plunges into the bed of the Purelake and animates a thunderclast, allowing it to tear itself free from the surrounding stone.
Thunderclasts fight on Roshar for the first time in thousands of years during the True Desolation. Thunderclast seem to rip themselves free of stone and fight on the side of Odium and the Singers. They are first encountered during the Battle of Kholinar. They are easily able to break the walls of the city down.
In the Battle of Thaylen Field two thunderclasts are created from spren going into the ground and animating a certain part of it. Odium called them by the names Kai-garnis and Yushah and commanded them throughout the battle. Both thunderclasts were eventually brought down, one by Szeth wielding Nightblood, and another by the combined efforts of Adolin, Renarin, and Hrdalm, a Thaylen Shardbearer.