Like we just mentioned, because of the guaranteed access to rare cards in Collector Boosters, they command a significantly higher price than a Play Booster: the MSRP for a Final Fantasy Collector Booster is a whopping $38 , compared to the $7 for a Play Booster
You can see the spell grants a creature you control an ability that triggers when it dies and that ability makes another creature stronger
Improvements + Cards To Drop The easiest upgrade is adding three more Emily Quackfaster Level-Headed Librarian
Maybe slap him with Voltron decks alongside commanders like Ardenn, Intrepid Archaeologist
A self-mill sub-theme with the likes of Patchwork Beastie and Fear of Missing Out could help a lot too, in terms of filtering through to the pieces you need
As an added bonus, I was actually able to explore a real life Skyclave and came back with some extraordinary kor artifacts (lovingly rendered by artistic whiz-kid Jeff Carpenter)