Awesome! Great catch.
Was hoping Nale’s spren (121) was something similarly fun, but looks like either AU (1-21), LA (12-1), or ABA (1-2-1). Unless I’m missing something (again ), not quite as fun?
In chapter 135, Nale’s spren says to 12124
And then at the end of the book 12124 is riding off with Sigzil, and needing a new name.
So, super obvious hint that this is Aux and he’ll bond Sigzil sometime between end of WaT and Sunlit Man?
Pretty fun!