The Warrior rides freely over his lands ("My lands are where my dead lie buried.") Spirit, in the form of a fiery eagle, ascends to the "land" of spirit, from which a face (Great Spirit or ancestral spirit) observes his son, Crazy Horse.
The mountain in the background demonstrates the lasting impression of Crazy Horse's spirit. Though he is gone, his spirit lives on. The mountain speaks smoke signals, "Hoka Hey!" which can be interpreted as "It's a good day to die!" This is not a death wish, but a statement of bravery. In other words, "today we have a chance to win honor through our actions."
The red-to-yellow spotty coloring of the eagle comes from it being cut out of a picture of the sun. The feather on the Warrior's head is a solar flare from that same picture. The lizard connects him to Wands and Waite, and is the color of sacred pipestone. Sacred pipes were hand-carved from this stone found in the Blacks Hills (sacred land) and used in rituals, prayers, etc. ("peace pipe"). Pipes represent the element of fire, and the prayers ascend to Wakan Tanka with the smoke. (Hoka hey.)
The "war paint" on his eye ties him in to Horus (a common correspondence for Son of Wands). The left eye of Horus symbolizes the moon, and so it is also my signature.
The graves below are from a photograph of a Native American cemetery. It represents the land and people he fought to save. Interestingly, the photo by Ansel Adams is called "Moonrise"!
Oh, and where's the wand, you ask? Well, it's his arm, of course.