Ok, let me get this straigt. You put the scepter shard entrusted to your Flight by Anachronos on a minnow of your own making and now you expect me to build an... an arcanite buoy or something... to force you minnow out of hiding? AND potentially incur the wrath of an Elemental Lord? Did I miss anything? Perhaps I am to do this without any clothes on, during a solar eclipse, on a leap year?
Right then...You have to build an arcanite Buoy and place it in the ocean. My Minnow will be attracted to the magical emanations. When he gets near the guoy - BLAMO! It will explode in a glorious pulse of arcane energy, revealing the minnow's true form. Also, you may or may not incur the wrath of Neptulon. A 50/50 chance I would say.