Rumor has it that Poseidon doesn't like the words human use. He recorded all his wisdom in the conches. This item can be obtained by consuming 500 Diamonds during the Sea of Fantasy Event that ran from Feb. 25 - Mar. 3, 2019. This item can be obtained by opening Crystal Ocean Eggs during the Sea of Fantasy Rerun event that ran from Jan. 30 - Feb. 5, 2020.