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===Screamers===
These spren are similar to the above spren in their color, being yellowish-white, but instead of appearing similar to windspren, these look more like "vivid yellow spheres cackling with energy." They are used during the [[Siege of Kholinar]] to locate any [[fabrial]]s being used in the city. If a fabrial is turned on, these 'screamers' will wail, then start twisting over each other above the area, alerting a quickly-following [[Fused]]. The screamers can also sense when a [[Lashing]] is used, but not when a [[lightweaving]] is created. [[Pattern]] explains that he and [[Shallan]] are quieter than [[Syl]] and [[Kaladin]]{{book ref|sa3|69}}. The screamers may be able to sense the output of [[stormlight]], meaning that illusions aren't detectable because they burn through much less [[Investiture]] than a [[Lashing]].
===Thunderclast===
[[Thunderclast]]s are giant stone monstrosities that are shaped like skeletons with angular, [[chasmfiend]]-like heads{{book ref|sa3|120}}. Their voidspren are huge spren, roughly the size of buildings. They are "souls so warped, so mangled, they didn't seem singer at all,"{{book ref|sa3|115}}. To bond, they take the stone in the ground as their form, inhabiting it like a body. Then they literally rip themselves from the ground. It is unknown why these huge voidspren don't need a gemheart to inhabit.
===Bonding to Humans===
{{quote
| Spren have always been able to bond with them, Turash. It merely requires the right mindset and the right environment.
| Odium explaining the voidsprens' bonds with humans{{book ref|sa3|115}}
}}
In previous Desolations, Odium hadn't learned to bond humans. But, while humankind was progressing on Roshar, Odium's knowledge was progressing on Braize. Somehow, Odium found out what was needed for voidspren to bond with man. First enveloping them in the [[Thrill]], he made Sadeas's soldiers in the Battle of Thaylen Field so willing to fight that they gladly accept the voidspren that Odium then sent into their minds.{{book ref|sa3|115}} These voidspren do not offer any surges, and, as far as was shown, only turns one to Odium's side of the conflict.
These spren look barely humanoid but twisted and warped. Shallan compares them to drawing she'd done in a maddened state, as they didn't look like people, but more like the scribbled outlines of one{{book ref|sa3|115}}.
===Fused===
What these voidspren look like is unknown, since the spren resides in their gemhearts{{cite}}. When bonding, the voidspren kills the previous mind of the body and controls it themselves{{book ref|sa3|I-6}}. These spren, as shown multiple time, do offer surges. Because there are nine orders of Fused, it is likely that there are nine different types of voidspren that create Fused.
===Regals===
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