Kripp's video on this deck: https://youtu.be/jKD-qVNBDSk
This is Version 1.0 of Kripparian's Gadgetzan OTK combo priest.
Tank till you get Spawn of Shadows, Garrison Commander and Raza, with as many hero power refreshes (Finley, Shadowform) as you need to kill. Spawn plus 0 cost hero power does the work.
Strong vs. most of the popular ladder decks (Dec. 2016) - hard aggro, super slow control,etc
Weak vs Control warrior (too much armor to OTK), freeze mage.