Kudos for the clear description of obliterate! Valshalla still gets her marker if you obliterate one of her clerics, but Ziggurat can't bring an obliterated creature back, and Goblin Bomber's detonate trigger is canceled (if he's obliterated after taking damage).
I've been bad about keeping up with the spoilers; do we know for sure that devour obliterates a creature if the devourer kills it with an attack?
