Queen Shayla, Swashbuckler

{1}{u}{b}, {t}: Until end of turn, whenever a creature you control deals combat damage to a player, create a colorless Gold artifact token with "Sacrifice this artifact: Add one mana of any color to your mana pool."
{5}{u}{b}, {t}: Look at the top seven cards of target opponent's library, then you may cast a nonland card from among them.without paying its mana cost. Spend only mana created by Gold to activate this ability.