Draw one of the top two cards of your deck and reduce its cost by 1. Discard the other.
Shiftstones are used to fuel magic and technology in Myria.
Quarry is a Spell.
How to Get Edit
Beat the seventh mission in Jekk's Bounty, "Grenadin Revolt".
This is good in decks that need a good way to filter their topdeck, such as Control or 3+ Faction decks. It is a common inclusion in a Stranger 5-faction deck.