The 'Pick Bonus' is triggered by landing 3 or more scattered bonus symbols after which 7 picks are awarded from 20 available prizes which can be Credit Awards from 50-250 credits times your bet multiplier, +3 Picks or the Special Symbol which awards a credit prize equal to all previous wins! The maximum number of picks is 13 and somewhat unexpectedly, the odds of triggering the Pick Bonus improve with decreased bet.
You win in the base game by landing winning paylines although the real fun is with one of the special features of the game: The Vault does indeed have it all and has launched with 3 themes: Egypt Gems, Vegas Luck and China Blessings, which is what I feature in this slot video.