A. The card that represented the secret bet is placed in a brand new row, above the monster that it represents. This card does not affect the current round at all, though certain special powers may access it, such as the Unicorn's teleportation ability or the Troll's regeneration.
Q. Can you play a Spectator card on a creature without a current Strength card?
A. Yes. A player may play a Spectator card on a creature that does not have a Strength card in the current round.
Q. What's a ducat?
A. A ducat is the value attached to a betting chip.