The reason why we collect cards is because of their collection value
I hope these numbers help you make decisions about what to buy and when
Instead of Cocoon, try Forced Adaptation, which puts a +1/+1 counter on the enchanted creature each turn without a drawback, or Spider Umbra, which gives your creature +1/+1 and reach, plus is a Totem Armor
This deck can deal as much as 29 DAMAGE ON TURN 3
Prospector serves as a sort of repeatable ritual effect when casting Dargo, as each goblin essentially pays for three mana of his casting cost
That being said, Rise of the Floodborn is a stellar set and getting the booster box was definitly the right way to go for someone like me who wants to experiment with a lot of different cards in multiple decks, while also granting me the chance to pull some very rare, very cool cards