The "sacred crest" of the Cobble Kingdom happens to look like a penant of sorts, or a flag. Like so:
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It can be figured out manually by following instructions found within the maze on the Isle of Ruins, in it's southwestern quarter. Just follow the stone tablets that you'll find there, and pay attention to the number of stars & directions shown on each tablet! The stars are that tablets placement in the sequence (there are five of them).
Hope that helps.
In the last boss, the crest is an hourglass. But, if you mean the other crest, it's the Triforce.
If you meant on Phantom Hourglass, you close your DS. I knew how to do that when I was 7.
You craft a piston with 3 wood on the top row, cobble stone-iron ingot-cobble stone in the middle row, then cobble stone-redstone-cobble stone on the bottom row. Lastly, you put a slime ball above the piston in the crafting table, and voilà! You have your sticky piston!
the first time you go to the temple symbol door the crest is an hourglass, the second time it is the tri-force triangle, picture of tri-force triangle here: http://upload.wikimedia.org/wikipedia/commons/thumb/8/86/Triforce.svg/512px-Triforce.svg.png
You need the cobble badge.
You have to get the last seachart that huge island on the chart that's the cobble kingdom
The cobble kingdom is actually the isle of ruins. (you need the fourth sea chart) :) :) :)
you draw the sacred crest on the door in a single stroke. if you dont know what the sacred crest is, then your lost. the sacred crest is the triforces.
The sacred crest is the triforce symbol.
cvghnvb vb vb
In the temple of the ocean king.
the triforce
The sacred crest is the image of three triangles put together to create one white triangle in the middle.
In the last boss, the crest is an hourglass. But, if you mean the other crest, it's the Triforce.
Close your DS and open it
Go to the area on the map where you transferred the crest.
the second crest is the tiforce if your asking about phantom hourglass