Complete Monster: The Seer is essentially he's a virus that didn't go off on the day it was scheduled to because he realized that humanity would survive. He spends the entirety of the comic finding a way to get a sprite body, then a physical body, so he could kill everybody in both worlds. The kicker? He didn't need to do any of this. He could easily kill both populations at any point, but wants to be there physically so he can see his victims cower in fear of him before he slaughters them. Then, once he was done with Earth, he planned to search the galaxy for other forms of life just so he could go on killing for eons. Radd probably summed it up best.
Radd: Dude, you are the sickest thing on the internet. And that's saying a lot.
The Seer: Blame my creator... I think I'll thank him personally before I kill him.