The Spell of the Shell

To perform this spell, you must find a suitable shell in shallow water. Take the
shell and dry it thoroughly. Next, place a symbol of your desire upon the
surface of the shell. The symbol must be made with a substance which will easily
wash off in water. Then, place the shell upon the shore, so that the Tide will
bring waves across the shell. Take care to note the phase of the Moon (waxing
moon for the gain of something, waning for the dissolving of something). When
the shell is in place, draw a triangle in the sand, enclosing the shell
completely. The symbol upon the shell must be facing upwards (toward the Moon).
Meaningful words, or phrases, may be placed upon the shell also, or simply
written in the sand (inside the triangle). Finally, give the words of
enchantment: (toward the moon)

"Goddess of Moon, Earth, and the Sea,
each wish in Thy name must come to be.
Powers and Forces which Tides do make,
now summon Thy waves, my spell to take "

Leave the area now, and the spell is set. Once the waves come, then your wish
will be taken out to the Old Ones. It will usually take about 7 days for a Lunar
spell to begin to manifest, but can take as long as 28 days.

This type of magic is what we call "little works", and belongs to the folkmagic
level of Witchcraft. There are, of course, much more involved spells, and such.
But, I do love the simplistic beauty of a spell like this.