The third of four enhanced plasma forms Hiryu has access to, the Ultra-Cold Cypher is obtained after Hiryu's second and final encounter with Ouroboros Mk.III, a creature capable of generating ultra-cold plasma by itself. By clearing his mind of all mundane thoughts (心頭滅却), the plasma generated within Hiryu's body turns into cryogenic plasma. Covering the Cypher's blade, its surface temperature reaches absolute zero, freezing anything it comes into contact with its edge. When active, Hiryu's plasma output changes from crimson to a bright blue.
The Ultra-Cold Cypher's main ability is to freeze any enemy it strikes within a layer of thick ice, stopping all its movement. The frozen enemy becomes a solid platform Hiryu can stand on or climb into, as well as an effective shield to block incoming projectiles. This also freezes flying enemies in mid-air. As such, the skill's main use is to reach hidden areas by using frozen enemies as foothold. The skill requires around 3 normal strikes or a single strike of the Charged Cypher to freeze a target. The frozen state is temporary, but continued strikes can keep an enemy frozen until destroyed. It is also required to break the Ultra-Cold enhanced shields wielded by certain Shield Troopers.
An Ultra-Cold Gate (コールドゲート) is a type of door found throughout Kazakh City, which can only be opened with the Ultra-Cold Cypher. These doors are made up of two spinning pieces in perpetual motion, which pushes Hiryu back if he attempts to cross them. By using the Ultra-Cold Cypher to stop its movement, however, they are temporarily unlocked.
- Capcom (2013). "Action: Cypher". Capcom's official Strider site. Retrieved December 8, 2016.