Here are the cards you need for the 'Wisdom of Sea and Sky Museum 1' secret mission: Heracross #164 (Full Artwork / One Gold Star) Magby #166 (Full Artwork / One Gold Star) Totodile #167 (Full Artwork / One Gold Star) Delibird #170 (Full Artwork / One Gold Star) Togepi #173 (Full Artwork / One Gold Star) Gligar #176 (Full Artwork / One Gold Star) Spinarak #177 (Full Artwork / One Gold Star) Tyranitar #179 (Full Artwork / One Gold Star) Sentrat #181 (Full Artwork / One Gold Star) Hoothoot #182 (Full Artwork / One Gold Star) Stantler #183 (Full Artwork / One Gold Star) Blissey #185 (Full Artwork / One Gold Star) Rewards: 36 Wonder Hourglasses, 12 Pack Hourglasses and 10 Shop Tickets
As for opening these serialized cards, you can only get them in collector boosters of the appropriate MTG set
Anger, Ogre Battledriver, Surrak, the Hunt Caller, Urabrask the Hidden, Fires of Yavimaya, Rhythm of the Wild, Fervor Haste
This design can get you a lot of lands if you have fetchlands, which isnt a thing I honestly care about because fetchlands are bad, but the purpose behind him is meant to be a board expander that can help you rebuild after board wipes, which again, I see as common in commander
I have always thought Slivers were cool and interesting, and its been an idea of mine to build a Sliver deck for years
Mana Vault left Extended just in time, but don't underestimate the importance of the drawbacks of Vault against Monolith - you have to untap it on your upkeep, and it does damage if you don't