after some research into the issue, as well as a careful study of the wording of Delg's
effect (they changed the name before it is even released. how lame), I have come to the conclusion that Delg will be able to mill from the deck even with removal
effects active on the
field. This is due to new information regarding how the milling
effects of lightsworn
monsters, as well as other milling
effects work. Essentially, if the milling
effect is a cost to activate an
effect, such as with
Celestia, Lightsworn Angel, then removal
effects would stop it. But if the milling is an
effect and not a cost, as with
Ryko, Lightsworn Hunter, even if the graveyard is the indicated target location, the milling still occurs. Given that Delg is worded in much the same way as Ryko, I am, for the time being, going to assume that Delg will be ruled the same way as well. This is good news for me, as I will not only be able to main deck Delg, but also perhaps tech in a Ryko or two as well.