What have I unearthed?

The speaker has discovered a bear Man'idō, as shown by the two hands grasping that animal by the back.

Down is the bear.

The bear is said to have his legs cut off, by the outline of the Midē' structure, signifying he has become helpless because he is under the influence of the shamans.

Big, I am big.

The speaker is great in his own estimation; his power of obtaining gifts from superior beings is shown by the arm reaching for an object received from above; he has furthermore overcome the bear Man'idō and can employ it to advantage.