Use once as a free action: flip a fair coin. Heads: learn the tier of your opponent's next draft offer. Tails: nothing but a sheepish flash on your king.
You draft Tea Leaves in either mode. Free action: you choose when to use it, and it resolves without costing your turn.
As a item card, it is a one-use consumable, drafted in either mode.
“The dregs spell out a single, smug number.”