As far as we know this should be ten characters.
recombining souls requires a (mini) calamity, aspecting them in the direction appropriate to the shard. As seen with ardbert and light. Calyx did a big electrope strike with probably lightning element on the player and was a bit surprised it didn’t work.
Since we’ve already had a couple of heritage dungeons, meta knowledge states that the 7.3 dungeon will probably be in living memory, an (admittedly deactivated) electrope place through the electrope rift in the calamity-stricken ninth. I wonder what calyx could possibly try here. Apart from accidentally summoning necron as a primal or big soupy soul or whatever.
This does look like could be potential set up for reattaching another shard, but so did zeromus and the memoriate crystal (more so with hindsight since zeromus punched through the dimension walls and that seems to be the running theme of azem’s magic). [Edit: also I have no idea who if anyone would have the wol soul, maybe outis do he can have yet another death scene]
Also still hoping that m11 is the underbomber and the wol is the only person not in on the joke. Two child geniuses in one patch seems a lot, but if calyx is a fabled figure, nor-black-cat-nor-wicked-thunder could be riffing on that for the alexandrians entertainment.