This booster pack contains 36 booster packs of the Gatecrash set for Magic the Gathering
I think this is an excellent mana rock in plenty of decks, just maybe not the precon it comes in
For two mana of any color, you can search your library for any dragon, discard it, and Scion of the Ur-Dragon becomes that dragon until the end of the turn
Most obviously, you can use Powerstones to cast artifact spells, like the retro version of Scrap Trawler from the Brothers War bonus sheet, which reads, Whenever Scrap Trawler or another artifact you control is put into a graveyard from the battlefield, return to your hand target artifact card in your graveyard with lesser mana value. Wait, lesser mana valuelesser mana value than WHAT
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