Hapatra does make -1/-1 counters and not +1/+1 counters, pretty important for the deck. You still probably play it, but I do want to point that out. Aside from the slip, this looks like a great start to pour money into. I will say you probably want Jiang Yanggu and Evolution Sage as easy to acquire tools that fit in great, but I assume they had to be cut out just to snake (ha) in under that fifty dollar mark. I sent the link to the resident Golgari guy at my LGS, who’ll probably eat it up. Good stuff.