A Glass Candle
Blur
The maesters of the Citadel keep candles of black Valyrian glass, and swear that a man who can light one may see things happening far away. The vision comes to you a fragment at a time, hidden behind a wall of dark. Reveal more of it to be sure — but the sooner you can name what you are looking at, the more it is worth. And name wrongly, and the vision is lost.
Named at first sight 5, then 4 · 3 · 2 · 1 as you reveal more. A wrong guess ends the vision at nothing — so reveal until you are sure.