Interesting. Pack Hunt plus Tooth and Nail. Unfortunately the wording doesn't quite work: if you do the second bit then you'll shuffle away the creatures you just put on top in the first bit! Also, I'm not really keen on letting the opponent pay to make your cards not very good, particularly if you've already paid 8 mana. Combine that with the way that the first ability would be nicer if it could choose the creature from the second ability, and I think you might end up concluding you want to reverse the order of the abilities. My proposed wording would be:

Search your library for a creature card and put it onto the battlefield tapped. Then choose a creature you control and search your library for up to three cards with the same name as that creature, reveal those cards, shuffle your library and put them on top of it.

(The "same name as" wording is necessary because "copy" means something different in Magic. Compare with the Oracle wording of Pack Hunt.)