How often do you plan on leaving Obz in on other peoples' turns? If the answers is more than "never", the spells that return him at EoT don't do much as you'll miss his chance to disappear for their turns.


Might consider Black Sun's Zenith as a wipe that hits Indestructibles as well.


I'd take Murder over Killing Glare.


As expensive as Extort can get, I'd consider some more artifact-based ramp. Something like Manalith is super cheap and does the job. As do Coldsteel Heart, Darksteel Ingot, and Chromatic Lantern (I've got an extra Lantern, pretty sure). Gilded Lotus is only $2 now, too, and is amazing in EDH.