I think the walls would have to be sac'd to demons, they're just
creatures with defender.  Without the walls, I wouldn't have anything to
cast until T4 at the earliest.  So I figure they can buy me some time
to cast Kaalia. 


I was going to just add some spot removal, but Walls
are re-usable and no one likes wasting kill spells on them.  That's the
idea anyway. If it slows a game too much, I'll toss them for some
aggressive creatures or mana acceleration. 




I like the deck because I think it has a lot of possibilities for improvement.  As is, pretty ho-hum, but we'll see.  Thanks for the suggestions.  I think the Aviary is a bit slow, but Island Sanctuary is a really good idea.