Lady Victoria Eclectic Pagan's blog: "Spells and Enchantments"

To perform this spell, you must find a suitable sea shell in shallow water. Take the shell and dry it thoroughly. Draw a symbol of your desire upon the surface of the shell. The symbol must be drawn with something that will easily wash off in water. Place the shell upon the shore (the sea shore is best, but any body of water large enough to have natural tides will do), 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/ground, enclosing the shell completely. The symbol upon the shell must be facing upwards (towards the moon). Meaningful words or phrases may be placed upon the shell also, or simply written in the ground/sand inside the triangle. Chant the following 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.

The spell is finished. Leave the area now. 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 it can take as long as 28 days.