Cursed reef shows up in Goal 9 Of Land and Sea. This follows What Storms May Come Part 4. Cursed Reef is 100,000 in Market but I took my time and got through with the drops of it that I got from the Tidegate pool. The good thing is that the Royal Kelpie will stay in the MRC and you can craft it eventually.
Here is link to info
https://forums.storm8.com/showthread...=1#post1467400