:lmao:
So, wait, did the Dwemer zero-sum, or did they all get their souls bound up into the Numidium?
Also, how does Akatosh have blood in the first place to join with Alessia? Or, is that just symbolic? Is it blood, or soul-stuff?
To deliberately misparaphrase: 'he knit together the bloody skeins of their hearts.' Symbolic, but magical to. I suppose there's not much difference in this case.
He put her in the soul gem, which was the Covenant.
Going a bit farther out on the limb, think of Alessia as a mother, joining with Akatosh (or Shezarr, remember that the Aedric mother Mara is the concubine of both) and giving birth to the new homeland of humanity: Cyrodiil. Much later, she mated with King Hrol and the land swelled into a hill (Sancre Tor) like a belly and gave birth to Reman.
Edit: Anumidum was the ultimate collective endeavor- a giant costume designed to take all the Dwemer and turn them into a single being. The universe naturally splits into smaller pieces, and the Dwemer were trying to reverse the process- on themselves.
So they were all svcked up into the walker, making it divine, and then it... didn't work. It sat there.