The vault locks for 6 of your turns. When it opens, if your queen is still on the board: your next draft offers three cards and you gain 20 seconds. If she is gone, the investment is lost.
You draft Compound Interest in Buff mode. Passive: it works on its own the whole time you hold it, with nothing to activate.
As a draft card, it bends one player's draft: the tier, the count, or the pool.
“The dial spins. The queen is the collateral.”
Needs one of your queens in play.