Obtain a piece of wood the size of your thumb-print, and inscribe thereon
a magical symbol of stability. Attach thereunto a piece of leather the
length of your arm, which has been heated over flame, dipped in a lake,
hung in the wind, and buried in the earth. Attach this to the piece of wood,
and place the wood in your mouth, using it to tighten a knot in the leather
as you wrap the leather around your upper arm. You shall have the
strength of the oak and the toughness of the leather so long as the knot
remains tied.