Evolving Adaptive is a good target, as it keeps the pumped-up stats from the two Oil counters
The Sibsig Ceremony reduces the cost of your creature spells by two generic mana, bringing Acererak down to just one black mana
Completing all these missions and opening the respective packs gets you well on your way to building the best decks in the game
Heck, you could even use it to make casting some hydras easier, since you dont have to pump as much into the X cost of hydra creature spells
Track what you own, what you need, and manage multiple collections for different purposes - trading stock, personal collection, or cards for sale
You have a feeling they want that extra card