Take a broad, thin piece of bark. put it into a bright fire
until it catches flame then quickly set it a little
distance from the fire.

When it has stopped burning, carefully stare at the symbols
visible in the charred ash-laden wood.

Once the fire has died to a glowing reddish-white mass of
coals, stare into its heart. If you wish, throw some Fire of
Azrael incense onto the coals (equal parts cedar, juniper & sandalwood).
This will flare up & burn, but will quickly die down.

With the scented smoke rising from the divination incense scry in the coals.
See what shapes the charred wood seem to form,
& determine their meaning through the language of symbolism.