The Discordance
"She dips her finger in the water, and traces something on the stage. "Some stars abandon the immutable light of their brethren for a more nuanced philosophy. The old language no longer suffices; heretical concepts exist for which it cannot provide signifiers." As the symbol takes shape, water turns to frost with a crackle.
"'These traitor-stars adopt another language. Or perhaps another dialect? The Discordance.'
She hisses and withdraws her finger from the completed symbol; the tip is blackened with frostbite."[1]

The Correspondence has an icy counterpart, called the Discordance. It is used by the sable suns who have joined the Liberation and abandoned their light. Discordance chills just as intensely as Correspondence burns.[1]
Many of the creatures in Traitor's Wood know the Discordance, as they are implied to be Are-Not.[2]