It's important to give Hortus some special golden sands and silver grains to plant in the garden. They will give bloom to something special that will help the Cause later on. This will involve you doing battle with Elite Sand Warriors and Sand Warriors. You will need to bring me two pouches of golden sand from Elite Sand Warriors and five portions of silver sands from Sand Warriors. Be wary battling the Sand Warriors, they are harsh opponents indeed. As soon as you have the sands and the grains bring them back to me. You have done an excellent job.