I'm happy with this concept, but I'm not happy with this list. I'm not sure about Holy Nova's inclusion for example, seems more like a tech card I might put in if I need it against aggro, and if I cut that I probably don't need Thalnos. I really wanted to put in Madame Lazul as well somewhere.
Love Lazul's scheme in this, though. Galakrond is in here just for the win condition with the hero power. The deck doesn't really have room for all the invoke cards, though I debated putting in Time Rip.
All the minions together make for 25 attack, +4 maximum of the ones stolen by Cabal Shadow Priest. If Galakrond gives you only small minions, how do you put enough stats on the board to generate 30+ damage? What if you don't get your Galakrond, as there's no draw whatsoever?
I love value as much as the next guy, but you need to deal some damage eventually, and IMHO this deck has no way of generating it.