Would you explain the poem of "Song of Powers" by David Mason stanza by stanza?

David
Mason's "Song of the Powers" presents a unique take on an old childhood game. The
basis for the poem is clearly the age-old struggle of "Paper Rock Scissors," with each
"power" contributing a stanza to the poem. The first stanza belongs to what is
traditionally called the rock. The stone gloats of its power to "crush." It alone is
"stronger than wishes" and is able to destroy the scissors (5). However, stanza two
belongs to paper, that which the rock cannot destroy.

In stanza two, the
paper claims "mine are the words / that smother the stone" (8-9). While words cannot
smother, the paper they are written on can, as long as a "shaper" exists to write and
the writing exists. In short, it is near-immortal. With its ability to smother rock and live
forever, paper's power seems limitless, until the final power speaks.

In
stanza three, the scissors claim "all the knives" that are "gnashing through
paper's / ethereal lives" (15-16). Despite the fact that paper's words are preserved in
print, scissors can still destroy them all. Further, at the end of the stanza, the scissors move
beyond the pride espoused by the stone and paper, suggesting, not only pride, but also a certain
level of enjoyment in the destruction, stating "no thing's so proper / as tattering
wishes" (17-18).

The final stanza presents a different speaker, one that
is not part of the traditional three-way game of destruction. This last entity presents the
finality of the game, stating that the three entities "all end alone" (22). The
narrator then addresses the reader, suggesting the grim finality that the three combatants face
is one that all face:

So heap up your paper
and
scissor your wishes
and uproot the stone
from the top of the hill.
They all end alone
as you will, you will. (23-28)

While the final stanza presents a foreboding vision, it exists more as a symbolic
warning that we should heed, rather than a promise of what is in store. If we continue to
"heap up [...] paper / and scissor [...] wishes / and uproot [...] stone," if we
continue to allow our pride to control us and perpetuate violence toward and destroy the wishes
of one another, then we will "all end alone."