The god Poseidon is a central figure in Greek mythology because he ruled the sea and thus influenced the livelihoods of travelling merchants and fishermen alike. Almost identical to the other male deities in the Pantheon, Poseidon was usually depicted with a full beard, curly hair, muscular form and toga, but distinguished by his surrounding and a period fishing tool, the trident. As there is no actual trident to examine, the aesthetics and dimensions of Poseidon's trident can only be imagined, however, period tools and artwork can provide an idea of the original vision of Greek artists.
Draw the outline of the trident's head on the cardboard. Use a depiction of Poseidon or a period fisherman's trident to determine the shape of the outline. For example, the Sicilian Hieron II coin depicts the trident with three evenly-spaced, arrow-tipped prongs. The central prong can be a little wider and longer than the other two.
Cut out the cardboard trident head. Use a craft knife instead of scissors for cleaner edges.
Trace the cardboard head on the cardboard and cut out three identical pieces.
Stack two of the cardboard tridents and wrap them with masking tape. Repeat with the remaining two cut-outs to make two thick trident heads.
Tape one head to the top of the broom pole so that the broom overlaps at least 2 inches of cardboard, running in-line with the central prong. Sandwich the pole by stacking the other cardboard cut-out on top. Tape the bundle together.
Wrap the head of the tool in tin, copper or bronze foil. Be sure to cover any gaps at the place where the pole meets the cardboard.
Glue the edges of the foil down to hold it in place.