The sign Ogundá Meyi includes this story:
Once in the land of the Arará, Asojano encountered Changó, who told him to sit on a large stone. Suddenly, the skill to divine came to Asojano and from then on he ruled over the Arará. This is why Asojano is made on a stone, rather than an overturned mortar like most orishas.
In this laconic explanatory tale, we see Asojano being guided to leadership by Changó, as in so many other stories. Here Changó directs him where to seat himself, a powerful move given the fact that “seating” the oricha is a major metaphor in both speech and ritual. The result is equally powerful: once seated, Asojano suddenly, inexplicably acquires the power of an oracle and can divine at will.
I love this image: Asojano is sitting on a stone, directly connected to the Earth, and he spontaneously becomes a spokesperson for the knowledge (or wisdom?) that comes up from the Earth. Speaking from this grounded place, he fulfills his natural authority and assumes his role as King of the Arará.
It reminds me of the Oracle of Delphi, where the priestess titled Pythia sat over a crevice in the Earth and spoke the truth for all who sought her advice.