Twenty things

Every one of them is written, built and actually in the pool. The rarities are set by the house and printed here, because a draw nobody can check is not a draw.

A door at the bottom of the Idrija mercury mine, opening onto a tunnel. Ten seconds, on a loop, going nowhere.
Audubon's 1834 plate of a mallard duck
Audubon drew this mallard in 1834. The duck behind the door is not this duck, but it is the same idea.

Common60 in every 100 people get one

Unusual30 in every 100 people get one

Rare9 in every 100 people get one

Legendary1 in every 100 people get one

A line of people in winter coats in the snow, winding out of sight around a large white building, 1909A 1940 building under a sign reading Department of Motor Vehicles, with a queue down the streetA long queue of people waiting to be fed, New York City, 1932

The line is still moving.

Take a number

0 people are standing in it at this exact moment, and it takes about four seconds to join them.